Selftestengine.1z0-460.71 - · PDF fileFrom Oracle Metalink Support D. From Linux vendors such as Red Hat or SUSE E. ... Oracle VM, and Oracle VM Templates for both Linux and Solaris

Selftestengine.1z0-460.71.QA

Number: 1z0-460Passing Score: 800Time Limit: 120 minFile Version: 8.1

http://www.gratisexam.com/

1z0-460

Oracle Linux 6 Implementation Essentials

It helped me a lot in my preparation for the test. It also helped me recognize my areas of strengths andweaknesses so that I could work upon them accordingly and scored highest.

It is the lone platform that is imminent. I am so proud of you for being so reputable!

Save your time and get on time success in certification exams by using our latest dumps.

Just wanted to say thanks for making an outstanding product!

It is time to ace your success chances because you can get best study materials for the preparation ofexam. Dump has everything that is not available in traditional study guides.

Guys!!! Took this exam today, all questions are from this dump.

Exam A

QUESTION 1What happens when the following command is run?

# authconfig - - passalgo = md5 - - update

A. It produces the MD5 checksum of the input data.B. It configures the MD5 checksum for newly authored documentsC. It converts the stdio input to MD5 algorithm.D. It changes the user password hashing algorithm to MD5.

Correct Answer: DSection: (none)Explanation

Explanation/Reference:To configure the Linux system to use the MD5 algorithm, enter:# authconfig --passalgo=MD5 --update

Note: The default algorithm for storing password hashes in /etc/shadow is MD5. I was told to use SHA-512hashing algorithm. How do I set password hashing using the SHA-256 and SHA-512 under CentOS orRedhat Enterprise Linux 5.4?

You need to use authconfig command to setup SHA-256/512 hashing. This command provides a simplemethod of configuring /etc/sysconfig/network to handle NIS, as well as /etc/passwd and /etc/shadow, thefiles used for shadow password support. Basic LDAP, Kerberos 5, and SMB (authentication) clientconfiguration is also provided.

Display Current Hashing Algorithm

Type the following command:# authconfig --test | grep hashing

Sample outputs:

password hashing algorithm is md5Configure Linux Server To Use The SHA-512To configure the Linux system to use the SHA-512 algorithm, enter:# authconfig --passalgo=sha512 --update

QUESTION 2As user bob, you have logged in to the system on a terminal and issued the following command to makethe top command run in the background.

[bob@host - ] top&

You exit from the terminal and log back as bob into the system at the same terminal. How is thebackground job affected?

A. The background job gets the foreground as soon as bob logs into the system.B. The background job is suspended temporarily from the job and resumes when user bob logs back in to

the system.C. The background job starts running in the background again as soon as bob logs into the system.D. The background job will not be affected.E. The background job is deleted from the job pool and does not get listed using jobs command.

Correct Answer: ESection: (none)Explanation

Explanation/Reference:

Valid Answer.

QUESTION 3Which rpm command can be used to find the package that owns the /etc/rsyslog.conf file?

A. rpm query /etc/rsyslog.confB. rpm gf /etc/rsyslog.confC. rpm q1 /etc/rsyslog.confD. rpm q /etc/rsyslog.conf

Correct Answer: BSection: (none)Explanation

Explanation/Reference:Package Selection Options include:-f <file>

Query package owning <file>

Note:rpm -q -- What does it do?One of the nice things about using RPM is that the packages you manage don't end up going into somekind of black hole. Nothing would be worse than to install, upgrade, and erase several different packagesand not have a clue as to what's on your system. In fact, RPM's query function can help you get out ofsticky situations like:

* You're poking around your system, and you come across a file that you just can't identify.Where did it come from?

* Your friend sends you a package file, and you have no idea what the package does, what it installs, orwhere it originally came from.

* You know that you installed XFree86 a couple months ago, but you don't know what version, and you can'tfind any documentation on it.

The list could go on, but you get the idea. The rpm -q command is what you need. If you're the kind ofperson that doesn't like to have more options than you know what to do with, rpm -q might look imposing.But fear not. Once you have a handle on the basic structure of an RPM query, it'll be a piece of cake.

QUESTION 4On your Oracle Linux 6 system, you have to configure the eth0 network interface to 100 MB/sec, halfduplex without trying to autonegotiate. Which command will help you configure this requirement?


A. # ifconfig eth0 speed 100 autoneg off duplex halfB. # ethtool interface eth0 speed 100 autoneg off duplex halfC. # ifconfig interface eth0 speed 100 autoneg off duplex halfD. # ethtool s eth0 speed 100 autoneg off duplex half


Explanation/Reference:When I have a device that is acting up, I tend to run: ethtool ethX, check the Supported link modes, the Linkpartner advertised link modes and the actual speed and Duplex. If my Supported link mode is set low (say10/Half for some reason) but my switch supports 1000baseT/Full then I'll use ethtool -s ethX to change myethernet settings to 1000baseT/Full. Just about anything you see from: ethtool ethX, can be changed withethtool -S ethX. In this case you would use the following:

ethtool -S eth0 speed 1000 duplex full autoneg on

QUESTION 5DTrace is being ported from Solaris to Oracle Linux. Which three statements are true for the DTrace tool?

A. DTrace allows static and dynamic tracing of your applications and your kernel.B. DTrace tool is used to compile debug kernel modules and device driversC. DTrace allows you to dynamically define probe points on the fly.D. DTrace probes and probe points are usually defined by the user using scripts written in a language

called D.E. DTrace tool is based on the strace Linux tool and includes both user and kernel strace features.

Correct Answer: ACDSection: (none)Explanation

Explanation/Reference:A: DTrace is a comprehensive dynamic tracing framework created by Sun Microsystems for troubleshootingkernel and application problems on production systems in real time.

C: Key benefits and features of DTrace on Oracle Linux include:

/ Designed to work on finding performance bottlenecks / (C) Dynamically enables the kernel with a numberof probe points, improving ability to service software/ Enables maximum resource utilization and application performance / Fast and easy to use, even oncomplex systems with multiple layers of software

D: Testers write tracing programs (also referred to as scripts) using the D programming language (not to beconfused with other programming languages named "D"). The language, a subset of C, includes addedfunctions and variables specific to tracing. D programs resemble awk programs in structure; they consist ofa list of one or more probes (instrumentation points), and each probe is associated with an action. Theseprobes are comparable to a pointcut in aspect-oriented programming.

QUESTION 6Identify the option with two files that are found in the /etc/sysconfig directory.

A. /etc/sysconfig/autofs and/etc/sysconfig/authconfigB. /etc/sysconfig/ifcfg-eth0 and/etc/sysconfig/atdC. /etc/sysconfig/resolv.conf and/etc/sysconfig/networkD. /etc/sysconfig/resolv.conf and/etc/sysconfig/grub.conf

Correct Answer: ASection: (none)Explanation

Explanation/Reference:* The /etc/sysconfig/autofs file defines custom options for the automatic mounting of devices.

* The /etc/sysconfig/authconfig file sets the kind of authorization to be used on the host.

Note: * /etc/sysconfig/network

Used to configure networking options.

Incorrect:

Not C, Not D:* The program that resolves hostnames to IP addresses reads a file called resolv.conf.This file is located in /etc/resolv.conf directory.

QUESTION 7Which two options can be completed when using the Firewall Configuration Tool, system config firewall?

A. Write complex firewall rules for checking, logging, and rejecting inbound and outbound connectionsB. Enabling or disabling the firewall entirelyC. Build a filter to obfuscate sensitive data (national ID numbers, Credit Cards, and so on)D. Select the services that have access to the network resource

Correct Answer: BCSection: (none)Explanation

Explanation/Reference:system-config-firewall

The GUI screen to control the firewall is available from the menu (System > Administration > Firewall) orcan be started from the command line using the system-config-firewall command.

Once started, the toolbar provides buttons to allow the firewall to be enabled/disabled (B). You can alsoconfigure basic trusted services, such as SSH, FTP and HTTP (C), by putting a tick in the appropriatecheckbox and clicking the "Apply" button on the toolbar.

The "Other Ports" section allows you to open ports that are not covered in the "Trusted Services" section.

QUESTION 8Identify the Oracle-supported source for obtaining Oracle Linux

A. From any good Linux distributionB. From Oracle's eDelivery software delivery cloudC. From Oracle Metalink SupportD. From Linux vendors such as Red Hat or SUSEE. From Anaconda Installer


Explanation/Reference:* Oracle Software Delivery Cloud. Here you can find downloads for the Oracle Linux Operating System,

Oracle VM, and Oracle VM Templates for both Linux and Solaris.

QUESTION 9View the output below. As oracle user, you run the following command on your Oracle Linux 6 system:

[oracle@dbhost ~ ] $[oracle@dbhost ~] $ nice - - 10 ./myscript.sh &[1] 2735[oracle@dbhost ~] $ nice: cannot set niceness: permission denied

Why is the nice command failing?

A. Shell scripts cannot be assigned a negative nice value.B. There is already another process running with same niceness value on this system.C. A negative nice value can be set by the root user.D. A nice value of -10 is not the permissible niceness range.

Correct Answer: CSection: (none)Explanation

Explanation/Reference:Only a privileged user may run a process with lower niceness:$ nice -n -1 nicenice: cannot set niceness: Permission denied$ sudo nice -n -1 niceNote: Sudo stands for either "substitute user do" or "super user do" (depending upon how you want to lookat it). What sudo does is incredibly important and crucial to many Linux distributions. Effectively, sudoallows a user to run a program as another user (most often the root user).

QUESTION 10You have to mount the Oracle Linux ISO image file OracleLinux R6 U2 Server X86_64- dvd.iso to the /media/cdrom mount point. Which command will help you mount the Oracle Linux ISO image file?

A. # mount OracleLinux R6 U2 Server X86_64-dvd.iso /media/cdromB. # mount t DVD OracleLinux R6 U2-Server-X86_64-DVD.iso/media/cdromC. # mount /dvd/OracleLinux -R6 -U2- Server=X86_64-dvd.iso /media/cdrom/OracleLinux-R6- UI-Server-

X86_64-dvd.isoD. # mount 0 ro, loop oracleLinux R6 U2 Server X86_64 dvd.iso /media/cdrom


Explanation/Reference:Mount the DVD iso of the desired update of Oracle Linux Release 5. Use the following command formounting the DVD media inserted in /dev/cdrom

# mount -r -o loop -t iso9660 /dev/cdrom /mnt

Use following command to mount iso image file

# mount -o loop <iso image file name> /mnt

QUESTION 11You have to find the default runlevel of your Oracle Linux system. Which file will help you find thisinformation?

A. /boot/grub/grub.confB. /etc/inittabC. /etc/rc.d/rc.sysinit

D. /etc/rc.localE. /etc/rc.d/init.d


Explanation/Reference:The default run level is specified in the /etc/inittab file.

QUESTION 12Examine the following commands:# groupadd project# mkdir /usr/share/project# chown R root.project /usr/share/project# qpasswd a scott project# qpasswd a foo project# chmod 2775 /usr/share/project

Based on the commands, which statement is correct?

A. Any new file created in the /usr/share/project folder by user scott will not be possible for foo to modify it.B. All members of the project group need the administrator's help to change the file permission every time

users write new files in the /usr/share/project folder.C. Files created by all members of the project group in the /usr/share/project folder will get the same group

permission as the folder itself.D. The chmod command can only take a three-digit argument.


Explanation/Reference:Corrected.

QUESTION 13Which three statements describe the Unbreakable Enterprise Kernel (UEK)?

A. The UEK contains proprietary Linux Kernel enhancements only available to Oracle Linux.B. The UEK is available for x86 (32 bit), x86-64 (64 bit), ARM 32 bit, and ARM 64 bit servers.C. Existing applications run unchanged with the UEK in place because all system libraries remain

unchanged.D. The UEK has more recent kernel enhancements for features like power management than the Red Hat

Compatible Kernel.E. The UEK has ASMlib included by default.

Correct Answer: ACESection: (none)Explanation

Explanation/Reference:A: The Unbreakable Enterprise Kernel Release 2 is Oracle's second major release of its heavily tested andoptimized operating system kernel for Oracle Linux 5 and Oracle Linux 6.C: Oracle claims that the Unbreakable Enterprise Kernel is compatible with RHEL, and Oracle middlewareand third-party RHEL-certified applications can be installed and run unchanged on Unbreakable EnterpriseKernel.E: Oracle ASMlib is included by default

Incorrect:Not B: Unbreakable Enterprise Kernel is available for x86-64 servers.

QUESTION 14Examine the sar command below. Your Oracle Linux system has one CPU. What does the runq- sz columnof this output convey about your system?

A. CPU is bottleneck because the run queue size is greater than the number of CPUs on your system.B. The average of three processes are only using the CPU on your system and hence the CPU is not a

bottleneck.C. CPU is not a bottleneck because the run queue size indicates the number of CPU bound processes on

your system.D. CPU is a bottleneck because the run queue size indicates that adequate memory is not allocated.


Explanation/Reference:* Use the sar -q command to report the following information:

The Average queue length while the queue is occupied.

The percentage of time that the queue is occupied.

* The following list describes the output from the -q option.

runq-szThe number of kernel threads in memory that are waiting for a CPU to run. Typically, this value should beless than 2. Consistently higher values mean that the system might be CPU-bound.

%runoccThe percentage of time that the dispatch queues are occupied.

swpq-szSwap queue of processes for the sar command.

%swpoccSwap queue of processes for the sar command.

QUESTION 15You want to allow multiple users the write access to files within the same directory, in addition, you want allthe new files created in this directory to be of the required group instead of the primary ID of the user whocreates the file. How do you accomplish this?

A. Set the setgid bit on the directory.B. Change the group owner of the new files manually.C. Run a cron job to change the group owner.D. Change the primary group ID of every user to the required group.

Correct Answer: A

Section: (none)Explanation

Explanation/Reference:Linux: SETGID on directory

SETGID stands for SET Group ID. We can use the command chmod to set the group ID bit for a directory.

chmod g+s mydir

or with numeric mode:

chmod 2775 mydir

After the change, the permission of the directory "mydir" becomes "drwxrwsr-x".

drwxrwsr-x 3 zen zen 4096 2010-03-18 19:57 mydir

But what is so special about setting the group ID for a directory? The trick is that when another user createsa file or directory under such a directory "mydir", the new file or directory will have its group set as the groupof the owner of "mydir", instead of the group of the user who creates it.

For example, if user2 belongs to the groups "user2" (main group) and "zen", and he creates a file "newfile"under the diretory "mydir", "newfile" will be owned by the group of "zen" instead of user2's main group ID"user2".

QUESTION 16You have to aggregate two network interfaces, eth0 and eth1, into a single logical interface such as bond0.Which option shows the four configuration files that need to be configured to set up this bonding?

A. /etc/sysconfig/network-scripts/ifcfg-bond0/etc/sysconfig/network-scripts/ifcfg-eth0/etc/sysconfig/network-scripts/idfg-eth1/proc/bonding.conf

B. /etc/sysconfig/network-scripts/ifcfg-bond0/etc/sysconfig/network-scripts/ifcfg-eth0/etc/sysconfig/network-scripts/idfg-eth1/etc/modeprobe.d/bonding.cfg

C. /etc/sysconfig/netwok-scripts/ifcfg-bond0/etc/sysconfig/netwok-scripts/ifcfg-eth0/etc/sysconfig/netwok-scripts/ifcfg-eth1/etc/modprobe.d/bonding.conf

D. /etc/sysconfig/network-scripts/ifcfg-bond0/etc/sysconfig/network-scripts/eth0/etc/sysconfig/network-scripts/eth1/etc/bonding.conf


Explanation/Reference:* Step #1: Create a Bond0 Configuration File

Red Hat Enterprise Linux (and its clone such as CentOS) stores network configuration in /etc/sysconfig/network-scripts/ directory. First, you need to create a bond0 config file as follows:# vi /etc/sysconfig/network-scripts/ifcfg-bond0

* Step #2: Modify eth0 and eth1 config filesOpen both configuration using a text editor such as vi/vim, and make sure file read as follows for eth0interface# vi /etc/sysconfig/network-scripts/ifcfg-eth0

* Step # 3: Load bond driver/module

Make sure bonding module is loaded when the channel-bonding interface (bond0) is brought up. You needto modify kernel modules configuration file:For each configured channel bonding interface, there must be a corresponding entry in your new /etc/modprobe.d/bonding.conf file.

QUESTION 17Your Oracle Linux system has two network interfaces eth0 and eth1. You have to change the netmask andthe IP address of the eth1 network interface. Which configuration file would you edit to make thesechanges?

A. /proc/net/ifcg-eth1B. /etc/sysconfig/network-scripts/eth1C. /etc/sysconfig/network/ifcg-eth1D. /etc/sysconfig/network-scripts/ifcfg-eth1


Explanation/Reference:The "/etc/sysconfig/network-scripts/ifcfg-eth0" file holds the network configuration for the "eth0" adapter. Ifyou have multiple network adapters, you would expect additional configuration files (eth1, eth2 etc.).

Note:* The "/etc/sysconfig/network" file holds top-level networking configuration, including the hostname andgateway settings.

QUESTION 18The crond daemon checks each command to see whether it should be run in the current ___________.

A. SecondB. MinuteC. HourD. Day


Explanation/Reference:The cron utility then wakes up every minute, examining all stored crontabs, checking each command to seeif it should be run in the current minute.

QUESTION 19Which two statements are correct about the Oracle ASMLib library?

A. Oracle ASMLib is an optional support library for the Automatic Storage Management (ASM) feature.B. To use ASMLib library, you have to recompile it first for the Unbreakable Enterprise Kernel.C. Oracle Automatic Storage management (ASM) requires Oracle ASMLib library to function completely.D. Oracle ASMLib kernel driver is included in the Unbreakable Kernel.

Correct Answer: ADSection: (none)Explanation

Explanation/Reference:A (not C): ASMLib is an optional support library for the Automatic Storage Management feature of theOracle Database.ASMLib allows an Oracle Database using ASM more efficient and capable access to the disk groups it is

using.D (not B): The Oracle ASMLib kernel driver is now included in the Unbreakable Enterprise Kernel. No driverpackage needs to be installed when using this kernel.

QUESTION 20You have to collect information about your Oracle Linux 6 system, such as hardware configuration, installedsoftware packages, configuration, and operational state send it to Oracle Support. Which tool will help yougather this information for sending it to Oracle Support?

A. sosreportB. iostatC. kdumpD. straceE. systemstat


Explanation/Reference:sosreport - Generate debugging information for this system

sosreport generates a compressed tarball of debugging information for the system it is run on that can besent to technical support reps that will give them a more complete view of the overall system status.

Incorrect:Not B: The iostat command is used for monitoring system input/output device loading by observing the timethe devices are active in relation to their average transfer rates. The iostat command generates reports thatcan be used to change system configuration to better balance the input/output load between physical disks.

Not C: kdump.conf is a configuration file for the kdump kernel crash collection service.

kdump.conf provides post-kexec instructions to the kdump kernel. It is stored in the initrd file managed bythe kdump service. If you change this file and do not want to restart before it takes effect, restart the kdumpservice to rebuild to initrd.

Not D: strace - trace system calls and signals

QUESTION 21What does the following btrfs command do?

$ sudo btrfs subvolume snapshot src src-01

A. Creates snapshots of the src src-01 subvolumesB. Creates a snapshot of the src-01 subvolumes in srcC. Creates the src and src-01 subvolumes and takes a snapshot of these subvolumesD. Creates a snapshot of the src subvolumes in src-01


Explanation/Reference:* To create a snapshot use

sudo btrfs subvolume snapshot /mnt/@ /mnt/@_snapshotthis will create a snapshot of the @ subvolume named @_snapshot located also in the top of the btrfs tree.

* btrfs subvolume snapshot <source> [<dest>/]<name>Create a writable snapshot of the subvolume <source> with the name <name> in the <dest> directory.

QUESTION 22

View the following GRUB command or the output of fixing the GRUB boot problem:

Based on the output, which statement is true?

A. The GRUB command sequence restores GRUB from the first partition on the second hard disk.B. The GRUB command sequence does not restore GRUB.C. GRUB command sequence restores GRUB from the second partition on the first hard disk.D. The GRUB command sequence verifies the stage1 on the first partition on first hard disk.


Explanation/Reference:hd0,1 indicates the first hard drive and the second partition.

Note:* grub - the grub shellEnter the GRand Unified Bootloader command shell.

* In the following example we assume that the boot partition is located at /dev/hda5 and that GRUB must beinstalled on the first disk's MBR.

grub> root (hd0,4)Filesystem type is ext2fs, partition type 0x83grub> setup (hd0)Checking if "/boot/grub/stage1" exists... yesChecking if "/boot/grub/stage2" exists... yesChecking if "/boot/grub/e2fs_stage1_5" exists... yesRunning "embed /boot/grub/e2fs_stage1_5 (hd0)"... 23 sectors are embedded.succeededRunning "install /boot/grub/stage1 (hd0) (hd0)1+23 p (hd0,4)/boot/grub/stage2 /boot/grub/menu.lst"...succeededDone.grub> quitThe first command includes the location of the boot partition, thus indicating where the boot loader files arelocated. The second command installs GRUB on the MBR. For this purpose, a file called stage1_5 is usedto grant GRUB access to the file system on the boot partition.

QUESTION 23You run the following command as the root user to set properties of a network interface (eth0):

# ifconfig eth0 192.0.2.102 netmask 255.255.255.0 up

Setting network interface properties with the ifconfig utility is not persistent across system reboots. Whichfile would you edit to make settings and to make them persist across system reboots?

A. /etc/sysconfig/network fileB. /etc/sysconfig/network/ifcg-eth0 fileC. /etc/sysconfig/network-scripts/ifcfg-eth0 fileD. /etc/sysconfig/network-scripts/eth0 file


Explanation/Reference:Modify the eth0 config fileOpen the configuration using a text editor such as vi/vim, and make sure file read as follows for eth0interface# vi /etc/sysconfig/network-scripts/ifcfg-eth0

QUESTION 24The change that are made by using echo command, like the one shown in the example below, are notpersistent and disappear when the system us restarted. Which file should be modified to makeconfiguration changes across reboots?

# echo www.example.com > /proc/sys/kernel/hostname

A. /etc/sys/sysct1.confB. /etc/sysconfig.confC. /etc/sysct1.confD. /proc/sysct1.conf


Explanation/Reference:Answer is Updated.

QUESTION 25The ASMlib on Linux us designed to ___________.

A. Make managing ASM volume easier.B. Make managing ASM volumes easier and provide a performance improvement over ASM volumes

alone.C. Provide load balancing across multiple volumes.D. Allow the user to list contents of the volume from the OS command line.


Explanation/Reference:ASMLib is an optional support library for the Automatic Storage Management feature of the OracleDatabase.ASMLib allows an Oracle Database using ASM more efficient and capable access to the disk groups it isusing.

QUESTION 26Which file system is both new and now installed by default in Oracle Linux 6 with Unbreakable EnterpriseKernel (UEK)?

A. ext4B. ext3C. zfs

D. ext2E. fat64


Explanation/Reference:Oracle Linux 6 includes many new features, including:

ext4 filesystemThe ext4 filesystem is installed by default.

QUESTION 27You have to collect data by using the OS Watcher tool to help diagnose a performance issue on yourOracle Linux system. You need to collect data every 30 seconds by using this tool and archive this data fora period of three days. Which is the OS Watcher tool option that can be used to collect this data from yoursystem?

A. # ./startOSWbb.sh t 30 p 3B. # ./startOSWbb.sh 30 72C. # ./startOSWbb.sh int = 30 days = 3D. # ./startOSWbb.sh 30 3


Explanation/Reference:Example:

./startOSWbb.sh 60 24

collect every 1 minute and keep 24 hours of archive files.

QUESTION 28Examine the following snippet from the rsyslog.conf file.

kern.crit /dev/consolekern.info; kern.!err /var/adm/kernel.log

What do these two rules mean?

A. Direct all kernel messages of the priority crit and higher to machine console. Additionally, log all kernelmessages that come with priorities from info and up in the /var/adm/kernel.log file.

B. Direct all kernel messages of the priority crit and higher to machine console. Additionally, log all kernelmessages that come with priorities from info up to warning in the /var/adm/kernel.log file.

C. Direct all kernel messages of the priority crit and higher to machine console. Additionally, log allmessages that come with priorities from info and err in the /var/adm/kernel.log file.

D. Direct all kernel messages of the priority crit and higher to machine console. Additionally, log all kernelmessages that come with priorities other than info and err into the /var/adm/kernel.log file.



kern.* /var/adm/kernelkern.crit @finlandia;RFC3164fmt

kern.crit /dev/consolekern.info;kern.!err /var/adm/kernel-info

The first rule direct any message that has the kernel facility to the file /var/adm/kernel.

The second statement directs all kernel messages of the priority crit and higher to the remote host finlandia.This is useful, because if the host crashes and the disks get irreparable errors you might not be able to readthe stored messages. If they're on a remote host, too, you still can try to find out the reason for the crash.

The third rule directs these messages to the actual console, so the person who works on the machine willget them, too.

The fourth line tells rsyslogd to save all kernel messages that come with priorities from info up to warning inthe file /var/adm/kernel-info. Everything from err and higher is excluded.

QUESTION 29Which two statements describe Oracle ksplice?

A. Ksplice actively applies kernel errata updates to the on-disk image and after a subsequent rebootchanges take effect.

B. Ksplice can be used to update Oracle Database software installed on a running Oracle Linux system.C. Ksplice actively applies kernel errata updates to the running Oracle Linux kernel image.D. Ksplice only works with the Red Hat Compatible Kernel.E. Ksplice allows customers to remain current with their OS vulnerability patches while at the same time

minimizing downtime.

Correct Answer: CESection: (none)Explanation

Explanation/Reference:Ksplice is a free software extension of the Linux kernel which allows system administrators to apply securitypatches to a running kernel without having to reboot the operating system (C, not A) (a technique broadlyreferred to as Dynamic Software Updating). It only supports patches that don't make significant semanticchanges to kernel data structures. Ksplice has been implemented for Linux on the x86-32 and x86-64architectures. It was developed by Ksplice, Inc. until 21 July 2011, when Oracle acquired Ksplice andstarted offering support for Oracle Linux (not D). Support for Red Hat Enterprise Linux was dropped andturned into a free 30-day trial for RHEL customers as an incentive to migrate to Oracle Linux PremierSupport.

QUESTION 30You have to find out the version of bash shell package installed on your Oracle Linux system. Which yumcommand can help you find the version information?

A. # yum version bashB. # yum showversion bashC. # yum info bashD. # yum listversion bash



[oracle@oraclelinux6 ~]$ yum info bash

Loaded plugins: refresh-packagekit, securityInstalled PackagesName : bashArch : x86_64

Version : 4.1.2Release : 9.el6_2Size : 3.0 MRepo : installedFrom repo : ol6_u3_baseSummary : The GNU Bourne Again shellURL : http://www.gnu.org/software/bashLicense : GPLv3+Description : The GNU Bourne Again shell (Bash) is a shell or command language : interpreter that iscompatible with the Bourne shell (sh). Bash : incorporates useful features from the Korn shell (ksh) and theC : shell (csh). Most sh scripts can be run by bash without : modification.

QUESTION 31As a root user, you executed the following command on your Oracle Linux 6 server:

[root@host] # strace - o /tmp/diag.out sh diag.sh

Which statement describes the purpose of this command?

A. It collects the memory and swap space metrics when the diag.sh scripts runs.B. It collects the operating system metrics when the diag.sh script runs.C. It records the memory usage and CPU usage information of the processes when the diah.sh script runs.D. It records the system calls, which are called by the processes when the diag.sh script runs.


Explanation/Reference:* strace - trace system calls and signalsIn the simplest case strace runs the specified command until it exits. It intercepts and records the systemcalls which are called by a process and the signals which are received by a process. The name of eachsystem call, its arguments and its return value are printed on standard error or to the file specified with the -o option.

* strace is a useful diagnostic, instructional, and debugging tool. System administrators, diagnosticians andtrouble-shooters will find it invaluable for solving problems with programs for which the source is not readilyavailable since they do not need to be recompiled in order to trace them. Students, hackers and the overly-curious will find that a great deal can be learned about a system and its system calls by tracing evenordinary programs. And programmers will find that since system calls and signals are events that happen atthe user/kernel interface, a close examination of this boundary is very useful for bug isolation, sanitychecking and attempting to capture race conditions.

Each line in the trace contains the system call name, followed by its arguments in parentheses and itsreturn value. An example from stracing the command ''cat /dev/null'' is:

open("/dev/null", O_RDONLY) = 3Errors (typically a return value of -1) have the errno symbol and error string appended. open("/foo/bar",O_RDONLY) = -1 ENOENT (No such file or directory) Signals are printed as a signal symbol and a signalstring. An excerpt from stracing and interrupting the command ''sleep 666'' is:sigsuspend([] <unfinished ...>--- SIGINT (Interrupt) ---+++ killed by SIGINT +++

Reference: man strace

QUESTION 32The Oracle "helper" package (RPM), formerly known as "Oracle-validated" (which helps meet prerequisitesfor installing Oracle software), has been renamed. What is the new name?

A. Oracle-11gR2-validatedB. Oracle-11fR2-valid_packageC. Oracle-rdbms-server-11gR2-preinstall

D. Oracle-11gR2-preinstall


Explanation/Reference:Now that the certification of the Oracle Database 11g R2 with Oracle Linux 6 and the UnbreakableEnterprise Kernel has been announced, we are glad to announce the availability of oracle-rdbms-server-11gR2-preinstall, the Oracle RDBMS Server 11gR2 Pre-install RPM package (formerly known as oracle-validated). Designed specifically for Oracle Linux 6, this RPM aids in the installation of the Oracle Database.

Reference: Oracle RDBMS Server 11gR2 Pre-Install RPM for Oracle Linux 6 has been released

QUESTION 33View the exhibit.

Examine the grub.conf file snippet in the Exhibit. Which statement is true if your Linux system boots byusing this grub.conf file?

A. GRUB will boot, by default, the first kernel entry of this grub.conf file.B. GRUB will prompt you to select the kernel to be booted because the default parameter is set to 0.C. GRUB will boot the kernel specified in the inittab file of the system.D. GRUB will boot, by default, the second kernel entry of this grub.conf file.

Correct Answer: A


Explanation/Reference:According the grub .conf file you have got 8 seconds to choose whether to boot the first entry. Now if youwant to change, and let say you want the second grub entry as booting system by default, just change theline:

default=0

by

default=1

QUESTION 34Which two statements describes the capabilities of Oracle Manager Ops Center product?

A. Oracle Enterprise Manager Ops Center can provide management services for Oracle Linux servers.B. Oracle Enterprise Manager Ops Center provides management services only for Oracle Solaris

operating system and SPARC servers.C. Oracle Enterprise Manager Ops Center contains tools to debug Oracle Linux kernel dump files.D. Oracle Enterprise Manager Ops Center includes built-in integration with My Oracle Support with

automatic servers request generation.


Explanation/Reference:Oracle Enterprise Manager Ops Center 12c is a foundational offering in the Oracle Enterprise Manager 12csolution. It introduces unique capabilities to strengthen Oracle Enterprise Manager 12c's ability to establish,manage, and support enterprise quality clouds delivered in an Infrastructure-as-a-Service model. With thelaunch of Oracle Enterprise Manager Ops Center 12c, Oracle Systems' customers utilizing SPARC, X86,Oracle Solaris, Oracle Linux (A), Oracle ZFS Storage Appliance, Oracle Switches, and both Oracle VMtechnologies can accelerate private cloud adoption faster at a lower cost. Oracle Enterprise Manager OpsCenter 12c provides a comprehensive solution for operating system, firmware and BIOS configuration, baremetal and virtual machine provisioning, hardware fault analysis, automatic My Oracle Support servicerequest generation (D), performance management, all while leveraging integrated diagnostics withautomatic server pool resource policies.

QUESTION 35Which two utilities can you use to manipulate the partition table on Oracle Linux?

A. fdiskB. formatC. chkdskD. partedE. system-config-disk


Explanation/Reference:A: fdisk - Partition table manipulator for LinuxD: If you do have a choice of using a disk label/partition tool during installation for example, the parted toolduring Oracle Solaris live image installation use a tool that allows alignment by sector. This means you canspecify a partition start and end using a sector number.

IncorrectNot C: chkdsk is not a linux command.

QUESTION 36Your 32-bit i686 architecture system in registered with the Oracle Unbreakable Linux Network. RPMpackage example -1 .0.0-1 is already installed and the application is used constantly. You want to downloadthe latest version of the example RPM package. You do not want to install the package until you havecoordinated with the program's current users. Which option will allow you to download until you havecoordinated with the program's current users. Which option will allow you to download the latest version ofthe RPM package, but not install it?

A. # rpm Uvh http://linix.oracle.com/rpms/i686/example-1.0.1-1.i686.rpmB. # yum no-update exampleC. # yumdownloader exampleD. # yum get example-1.0.1


Explanation/Reference:yumdownloader is a program for downloading RPMs from Yum repositories.

Synopsisyumdownloader [options] package1 [package2...]

Note:* yum - Yellowdog Updater Modifiedyum is an interactive, rpm based, package manager. It can automatically perform system updates, includingdependency analysis and obsolete processing based on "repository" metadata. It can also performinstallation of new packages, removal of old packages and perform queries on the installed and/or availablepackages among many other commands/services (see below). yum is similar to other high level packagemanagers like apt-get and smart.

QUESTION 37As a system administrator, you run the system-config-network tool and make changes to the configuration.You change the hostname and the DNS search path settings. Which two files will these changes be writteninto?

A. "/etc/sysconfig/network" and "/etc/resolv.conf" filesB. "/etc/sysconfig/network" and "etc/nsswitch.conf/" filesC. "/etc/sysconfig/netconfig" and "/etc/resolv.conf" filesD. "etc/sysconfig/network-scripts/network" and "/etc/resolv.conf" files


Explanation/Reference:Corrected.

QUESTION 38Which yum command will you use if you want to find out the name of the package that has the /etc/sysconfig/nfs file?

A. # yum info /etc/sysconfig/nfsB. # yum search /etc/sysconfig/nfsC. # yum list installed | grep /etc/sysconfig/nfsD. # yum check /etc/sysconfig/nfs


Explanation/Reference:yum list installed [glob_exp1] [...]List the packages specified by args. If an argument does not match the name of an available package, it isassumed to be a shell-style glob and any matches are printed.

Incorrect:Not A:infoIs used to list a description and summary information about available packages

Not B:searchThis is used to find packages when you know something about the package but aren't sure of it's name. Bydefault search will try searching just package names and summaries, but if that "fails" it will then trydescriptions and url.

Not D: checkChecks the local rpmdb and produces information on any problems it finds.

QUESTION 39You have mounted an Oracle Linux 6 ISO image (v33411-01.iso) on your system in the /mnt/iso/OL6u3/Server directory. You want to use this image in your local yum repository configuration file and enable it.Which yum repository configuration file has the correct entries to use this image as a local repository?

A. [ol6u3_base_media]name=Oracle Linux 6 Mediabaseurl=file:///mnt/iso/OL6u3/Servergpgcheck=1enabled=0

B. [ol6u3_base_media]name=Oracle Linux 6 Mediabaseurl=file:///mnt/iso/V33411-01.isogpgcheck=1enabled=1

C. [ol6u3_base_media]name=Oracle Linux 6 Mediabaseurl=file:///mnt/iso/OL6u3/Servergpgcheck=1enabled=1

D. [ol6u3_base_media]name=Oracle Linux 6 Mediabaseurl=file:///mnt/isso/OL6u3/Server/gpgcheck=1enabled=1



QUESTION 40The DBA tells you that the system is not overloaded but you can tell that the system us actively swapping.What command would you run to show this information to the DBA?

A. # iotopB. # iostat 5 10C. # cat /proc/meminfoD. # vmstat 5 10

Correct Answer: D



QUESTION 41Which two commands can be used on Oracle Linux to find the routing table and default gatewayinformation of your network?

A. netstat rB. route showC. cat /proc/routeD. route nE. traceroute


Explanation/Reference:A: netstat - Print network connections, routing tables, interface statistics, masquerade connections, andmulticast memberships

D:* route - show / manipulate the IP routing table

* route n-nshow numerical addresses instead of trying to determine symbolic host names. This is useful if you aretrying to determine why the route to your nameserver has vanished.

* The output of the kernel routing table is organized in the following columns

DestinationThe destination network or destination host.

GatewayThe gateway address or '*' if none set.

GenmaskThe netmask for the destination net; '255.255.255.255' for a host destination and '0.0.0.0' for the defaultroute.

Incorrect:Not B: use route n. No subcommand show.Not E: traceroute - print the route packets trace to network host

QUESTION 42Examine the output of the yum.conf configuration file from o Oracle Linux 6 server.

What does the "installonly_limit=3" option mean?

A. Only three users can use the yum command simultaneously to install package on Oracle Linux 6 server.B. Only three Linux packages can be installed in one invocation of the yum command.C. Only three repository channels can be used for installing Linux packages.D. Only three versions of packages listed in installonlypkgs can be installed simultaneously.


Explanation/Reference:installonly_limit

Number of packages listed in installonlypkgs to keep installed at the same time. Setting to 0 disables thisfeature. Default is '3'. Note that this functionality used to be in the "installonlyn" plugin, where this option wasaltered via. tokeep. Note that as of version 3.2.24, yum will now look in the yumdb for a installonly attributeon installed packages. If that attribute is "keep", then they will never be removed.

Reference: yum.conf

QUESTION 43Examine the following kernel boot command-line parameters.

kernel /vmlinuz-2.6.32-220.e16 ro root = /dev/VolGroup00/LogVol00 init = /bin/bash ether = 0, 0, eth1 rhgbquiet

Which two statements are true?

A. An unrecognized kernel boot command-line parameter has been used.B. The system will boot without password.C. Boot argument ether will force probing for a second ethernet card (NIC).D. It will not probe for any hard drive.

Correct Answer: CDSection: (none)Explanation

Explanation/Reference:C: Ether parameter:The most common use of this parameter is to force probing for a second ethercard, as the default is to only

probe for one (with 2.4 and older kernels). This can be accomplished with a simple:

ether=0,0,eth1

Note:* rhgb stands for redhat graphical boot. This is a GUI mode booting screen with most of the informationhidden.* quiet parameter hides the majority of the boot messages before rhgb starts.

QUESTION 44The sshd service running and you execute the following command:

# chkconfig sshd off

What happens when you run this chkconfig command?

A. The sshd service disabled only for runlevel 5.B. The sshd service id disabled for runlevels 2, 3, 4, and 5, but the ssh service is still available until the

next reboot.C. The sshd service is disabled for runlevels 2, 3, 4, and 5 and ssh service is stopped.D. The sshd service is disabled only for current runlevel.



QUESTION 45What are the two benefits of configuring network interface bonding?

A. aggregating two or more Network Interfaces (NICs) to act as one logical interfaceB. creating a static address that is bound to one NICC. providing either failover or load-balancing to two or more Network Interfaces (NICs)D. binding a network interface to the embedded firewall (IPTables) for port filtering

Correct Answer: ACSection: (none)Explanation

Explanation/Reference:Network bonding refers to the combination of network interfaces on one host for redundancy and/orincreased throughput.

QUESTION 46View the cron job example below. How often will this cron job run?

0 */ 5 * * * command

A. every 5 minutesB. every 5 hoursC. every 5 daysD. every 5th month


Explanation/Reference:Execute a cron job every 5 Hours

The second field is for hours. If you specify * in this field, it runs every hour. If you specify */5 in the 2ndfield, it runs every 5 hours as shown below.0 */5 * * * /home/ramesh/backup.sh

QUESTION 47Which option determines whether a system users NIS, local files, DNS, or a combination as the source ofinformation, and also order of the source?

A. /etc/resolv.confB. /etc/idap.confC. /etc/nsswitch.confD. /etc/yp.conf


Explanation/Reference:The Name Service Switch (NSS) configuration file, /etc/nsswitch.conf, is used by the GNU C Library todetermine the sources from which to obtain name-service information in a range of categories, and in whatorder. Each category of information is identified by a database name.

The file is plain ASCII text, with columns separated by spaces or tab characters. The first column specifiesthe database name. The remaining columns describe the order of sources to query and a limited set ofactions that can be performed by lookup result.

Incorrect:Not A: In most Unix-like operating systems and others that implement the BIND Domain Name System(DNS) resolver library, the resolv.conf configuration file contains information that

Not D: /etc/yp.conf - NIS binding configuration file

Reference: nsswitch.conf

QUESTION 48Which three things does oracle-edbms-server-11gR2-preinstall RPM package do to simplify the installationof Oracle Database on Oracle Linux 6 systems?

A. Downloads and installs various software packages and specific versions needed for Oracle databaseinstallation

B. Downloads and installs packages required for Oracle Database installation, runs the runInstaller utility toinstall the database, and then starts the database

C. Creates the Oracle user and the oinstall and dba groups, which are the default user and groups usedduring Oracle database installation

D. Modifies and sets kernel parameters in /etc/sysctl.conf and sets shell resource limits in /etc/security/limits.conf based on the Oracle Database Server installation requirements

E. Checks whether all packages are installed to support RDBMS and then calls the Oracle UniversalInstaller utility to install RDBMS and then calls the Oracle Universal Installer utility to install RDBMS

Correct Answer: ACDSection: (none)Explanation

Explanation/Reference:In order to install the Oracle Database 11g R2 on Oracle Linux 6, your system needs to meet a fewprerequisites, as outlined in the Linux Installation Guides. Using the Oracle RDBMS Server 11gR2 Pre-install RPM, you can complete most of the pre-installation configuration tasks.

The package:

* (A) Causes the download and installation of various software packages and specific versions needed fordatabase installation, with package dependencies resolved via yum* (C) Creates the user oracle and the groups oinstall and dba, which are the defaults used during databaseinstallation* (D) Modifies kernel parameters in /etc/sysctl.conf to change settings for shared memory, semaphores, themaximum number of file descriptors, and so on* (D) Sets hard and soft shell resource limits in /etc/security/limits.conf, such as the number of open files,the number of processes, and stack size to the minimum required based on the Oracle Database 11gRelease 2 Server installation requirements* Sets numa=off in the kernel boot parameters for x86_64 machines

QUESTION 49You found a message on a public discussion forum mentioning a Vulnerability (for example, CVE-2006-5794), which could affect some versions of OpenSSH in Linux distribution. Identify the command that wouldallow you to see whether this CVE has been applied.

A. rpm q changelog openssh | grep 5794B. yum listcvew opensshC. rpm -qa | grep openssh | grep 5794D. yum sec -list cves


Explanation/Reference:* The command rpm -q --changelog rpm displays a detailed list of information (updates, configuration,modifications, etc.) about a specific package. This example shows information about the package rpm.However, only the last five change entries in the RPM database are listed. All entries (dating back the lasttwo years) are included in the package itself. This query only works if CD 1 is mounted at /media/cdrom:rpm -qp --changelog /media/cdrom/suse/i586/rpm-3*.rpm

* Is the patch RPM suitable for my system?

To check this, first query the installed version of the package. For pine, this can be done with

rpm -q pinepine-4.44-188

Incorrect:not C:

* qa stands for "Query All"Assuming you are attempting to find out if you have the Very Secure FTP Daemon installed, you want:rpm -qa | grep vsftprpm -qa will show you all installed RPMs, piping it through grep will limit the list to RPMs containing thestring "vsftp".

QUESTION 50Which two conditions will cause OCFS2 to evict a node?

A. When a node no longer responds to network heartbeat signals from other members of the cluster

B. When storage array is at 90% capacityC. When access to storage is lostD. When a node is running at 90% utilization


Explanation/Reference:A: How does the disk heartbeat work?Every node writes every two secs to its block in the heartbeat system file. The block offset is equal to itsglobal node number. So node 0 writes to the first block, node 1 to the second, etc. All the nodes also readthe heartbeat sysfile every two secs. As long as the timestamp is changing, that node is deemed alive.

QUESTION 51What types of packages are contained in the Oracle Public YUM server?

A. Base releases of Oracle and RedHat Linux distributionsB. Base releases of Oracle Linux and extra/updates for Oracle LinuxC. Red Hat Compatible Kernel, UEK, and Oracle database softwareD. Base release of Oracle Linux


Explanation/Reference:The Oracle public yum server offers a free and convenient way to install the latest Oracle Linux packagesas well as packages from the Oracle VM installation media via a yum client.

You can download the full Oracle Linux and Oracle VM installation media via edelivery.oracle.com/linux.

Note:Getting Started

1. Download and Install Oracle Linux2. Download and copy the appropriate yum configuration file in place, by running the following commandsas root:

Oracle Linux 4, Update 6 or Newer

# cd /etc/yum.repos.d# mv Oracle-Base.repo Oracle-Base.repo.disabled# wget http://public-yum.oracle.com/public-yum-el4.repo Oracle Linux 5

# cd /etc/yum.repos.d# wget http://public-yum.oracle.com/public-yum-el5.repo Oracle Linux 6

# cd /etc/yum.repos.d# wget http://public-yum.oracle.com/public-yum-ol6.repo Oracle VM 2

# cd /etc/yum.repos.d# wget http://public-yum.oracle.com/public-yum-ovm2.repo

3. Enable the appropriate repository by editing the yum configuration file

Open the yum configuration file in a text editorLocate the section in the file for the repository you plan to update from, e.g. [el4_u6_base] Changeenabled=0 to enabled=14. Begin using yum, for example:yum list

yum install firefox

You may be prompted to confirm the import of the Oracle OSS Group GPG key.

QUESTION 52A system administrator wants to enable packet without making the changes permanent.

What command would he use to complete this action?

A. Echo 1> /proc/sys/net/ip_forward/B. Echo 1> /proc/sys/net/ipv4/ip_forwardC. Echo 1 > /etc/sysconfig/sys/net/ipv4/ip_forwardD. Echo 0 > /proc/sys/net/ipv4/ip_forward


Explanation/Reference:The '1' in "/proc/sys/net/ipv4/ip_forward" enables IP forwarding.

A '0' signifies IP forwarding is disabled.

QUESTION 53Which two statements are true about Oracle Clusterware Software?

A. Oracle Clusterware is a portable software that allows clustering of single servers so that they cooperateas single system.

B. Oracle Clusterware is a portable cluster software that can be installed on Oracle Engineered Systems.C. Oracle Linux Support customers at the Basic or premier level are entitled, at no additional license and

support costs, to download and deploy Oracle Clusterware in Linux cluster covered their Linux Supportagreement.

D. Oracle Clusterware is an add-on software that is supported Oracle Linux only.


Explanation/Reference:A: Oracle Clusterware is software that enables servers to operate together as if they are one server. Eachserver looks like any standalone server. However, each server has additional processes that communicatewith each other so the separate servers appear as if they are one server to applications and end users.C: Oracle Linux support customers at the Basic and Premier support levels can download and deployOracle Clusterware at no additional license fee or support cost.

Incorrect:Not D: Oracle ClusterWare services are available for Unix, Linux, and Windows.

QUESTION 54Describe Oracle's Unbreakable Linux Network (ULN).

A. A complete resource for the Linux community to obtain Linux software for Oracle and RedHat LinuxB. A forum site to discuss Linux issues that is moderated by Oracle Linux expertsC. A collection of Linux documentation and sites to download software and updatesD. A comprehensive resource for Oracle Linux support subscribers that offers access to Linux software

patches, updates, and fixes.


Explanation/Reference:ULN is a comprehensive resource for Oracle Linux support subscribers, and offers access to Linuxsoftware patches, updates and fixes.

QUESTION 55Finding a directive issued by your organization listing several important CVEs (Common Vulnerability andExposures), you find one for Linux OpenSSH (CVE-2006-5764), which might apply to your oracle Linuxsystems. What command would help ensure that a patch has been applied to close this vulnerability on anOracle Linux 6 system running OpenSSH server?

A. yum listcves opensshB. rpm qa | grep openssh | grep 5794C. rpm q - - changelog openssh | grep 5794D. yum sec list cves | grep 5794E. yum sec list cvesApplied


Explanation/Reference:* The command rpm -q --changelog rpm displays a detailed list of information (updates, configuration,modifications, etc.) about a specific package. This example shows information about the package rpm.However, only the last five change entries in the RPM database are listed. All entries (dating back the lasttwo years) are included in the package itself. This query only works if CD 1 is mounted at /media/cdrom:

rpm -qp --changelog /media/cdrom/suse/i586/rpm-3*.rpm

* Is the patch RPM suitable for my system?

To check this, first query the installed version of the package. For pine, this can be done with

rpm -q pinepine-4.44-188

QUESTION 56Which three parameters of a network interface can you modify by using the NetworkManager tool on yourOracle Linux 6 system?

A. IPv4 settingsB. IPv6 settingsC. Netconsole settingsD. MTU settingsE. IP Proxy settings

Correct Answer: ABDSection: (none)Explanation


Note:1 Right-click the NetworkManager icon in the notification area at the top-right corner of the Red Hat desktopand click "Edit Connections."Click the "System eth0" connection on the wired tab and click "Edit." Click the "IPv4 Settings" tab.

QUESTION 57Which two statements describe the capabilities used with the Unbreakable Enterprise Kernel?

A. Existing Red Hat Enterprise Linux 5 and 6 customers need to reinstall Oracle Linux to use theUnbreakable Enterprise Kernel.

B. The Unbreakable Enterprise kernel is the default kernel starting with Oracle Linux 5.6.C. The Unbreakable Enterprise kernel is required when using multithreaded CPUs.D. Oracle Clusterware, OCFS2, and the Enterprise Manager pack for Linux support are included with

Oracle Linux Basic and Premier support.E. Switching between the Red Hat Compatible kernel and the Unbreakable Enterprise kernel is simple

process of changing kernels and glibc.

Correct Answer: DESection: (none)Explanation

Explanation/Reference:* Commercial technical support is available through Oracle's Oracle Linux Support program, which supportsOracle Linux, and existing RHEL or CentOS installations (i.e. without reinstallation).

Note:* The Unbreakable Enterprise Kernel Release 2 is Oracle's second major release of its heavily tested andoptimized operating system kernel for Oracle Linux 5 and Oracle Linux 6. Unbreakable Enterprise KernelRelease 2 is based on the mainline Linux kernel version 3.0.16 and boasts a wide range of new features

and improvements relevant for enterprise workloads.

Incorrect:Not A, not B: Unbreakable Enterprise Kernel Release 2 can be installed on Oracle Linux 5 Update 8 ornewer, as well as on Oracle Linux 6 Update 2 or newer.

QUESTION 58You have successfully installed the uptrack tool on servers you will be using ksplice kernel updates. Whichtwo options are correct descriptions of commands you can run?

A. "uptrack-show": list the active Oracle Ksplice updates in your running kernel.B. "uptrack-upgrade": connect to the Uptrack update server, check and apply new updates when available.C. "uptrack-upgrade": connect to the Uptrack update server, check and download a new update to the

uptrack tool.D. "uptrack-show <key>": list the servers that have the uptrack tool installed using the current key.

Correct Answer: ABSection: (none)Explanation

Explanation/Reference:A: uptrack-show

You can see what updates have been installed by running uptrack-show:B: uptrack-upgrade

Ksplice updates are the same security and bugfix updates you would get from your Linux vendor, packagedin a special rebootless form. To apply Ksplice updates, just run uptrack- upgrade.

QUESTION 59You have executed the following commands as the root user:

# find /home | cpio o H tar F root@HostA: /dev/nst0 - - rsh command = /usr/bin/ssh

What is the purpose of issuing this command?

A. To archive the contents of the /home directory in the tar format to a remote host system's tape drivedevice /dev/nst0

B. To archive the contents of the /home directory in the cpio format to a remote host system's tape device /dev/nst0

C. To archive the contents of the /home directory in the cpio and tar formats to a remote system's tapedrive device /dev/nst0

D. To extract the contents of the /home directory from the tape drive device /dev/nst0


Explanation/Reference:Note:

* The cpio command is one of standard Unix backup utilities. It stands for "copy in/out." It is much less wellknown and more rarely used Unix utility in comparison with tar.

* The cpio command is one of standard Unix backup utilities. It stands for "copy in/out." It is much less wellknown and more rarely used Unix utility in comparison with tar.

* -H format. Here tar

QUESTION 60View the output below.

As a root user, you run the two ulimit commands as shown in the output below. Why does the second ulimitcommand fail as shown in the output?

A. The ulimit command cannot be run from the bash shell.B. The ulimit command syntax is not correct.C. The soft limit value of file description cannot be set greater than the hard limit value.D. The soft limit of file descriptions' value should always be less than 1024.


Explanation/Reference:Any user can set a soft limit to any value less than or equal to the hard limit. Any user can lower a hard limit.Only a user with appropriate privileges can raise or remove a hard limit.

Note:* limit, ulimit, unlimit set or get limitations on the system resources available to the current shell and itsdescendents

* Syntax:ulimit [- [HS] [c | d | f | n | s | t | v]] limit-HDisplays or sets a hard limit.

S-Displays or sets a soft limit.

Reference: man ulimit

QUESTION 61What does the following line in the modprobe.conf file indicate?

options netconsolenetconsole = [email protected]/eth0, [email protected]/00:0C:A3:35:9C

A. Netconsole logging is set up to send messages to a server at the IP address 192.168.1.200 by using theeth0 device.

B. Netconsole logging is set up to send messages to a server at the IP address 192.168.1.200 by using theport number 6666.

C. Netconsole logging is set up to send messages to a server at IP address 192.168.1.200 by using theUDP port 514.

D. Netconsole logging is set up for two clients with IP addresses of 192.168.1.200 and 192.168.1.100 onthis server.



options [email protected]/eth0,[email protected]/00:1A:A0:D2:55:66

Explanation

6666 => Server source port10.0.0.1 => Server IPeth0 => Server NIC514 => Client listening port10.0.0.2 => Client IP00:1A:A0:D2:55:66 => Client MAC

QUESTION 62The /proc file system is a pseudo-file system, which is used as an interface to kernel data structures. Whichfour statements are true about the /proc file system?

A. The /proc file system contains a numerical subdirectory for each running process.B. The /proc file system contains a hierarchy of special files that represent the current state of the kernel.C. The /proc file system has to be mounted by the system administrator after a reboot.D. The /proc/cpuinfo virtual file identifies the type of processor used by your system.E. The /proc directory contains information about system hardware and any running processes.F. The files in the /proc directory are read-only system files that cannot be changed.

Correct Answer: ABDESection: (none)Explanation

Explanation/Reference:* The /proc file system exists in slightly different variations on Linux and the Solaris OS. On both systems, /proc is a directory containing files whose names are the process IDs of the current active processes on thesystem (A). Each PID-named file is in turn a directory. /proc on Linux has various other directories besidesprocesses. Most of these deal with processors, devices, and statistics on the system. On Linux, one looksin /proc to find information about processes, processors, devices, machine architecture, and so on (E).

* The /proc is a virtual file system that contains files that show the status of the Linux operating systemkernel. Most of the files have a size of 0 bytes, but they actually contain a large amount of data. Thetimestamps of these virtual files changes as the contents of the files are updated by the OS.

* The following virtual files provide an indication, at the moment they are being viewed, about the systemhardware:n /proc/partitions: Gives the size and name of partitions

n /proc/meminfo: Memory statistics and segment sizes

n /proc/mounts: List of the mount points

n /proc/uptime: Uptime of the system

n /proc/interrupts: List of interrupts on the system

D: The contents of the files can be seen with the classical command cat, thereby viewing the information ofthe CPU.

linux-mlpb:~ # cat /proc/cpuinfoprocessor : 0vendor_id : GenuineIntelcpu family : 6model : 9model name : Intel(R) Pentium(R) M processor 1700MHzstepping : 8cpu MHz : 1694.501cache size : 1024 KBfdiv_bug : no

hlt_bug : nof00f_bug : nocoma_bug : nofpu : yesfpu_exception : yescpuid level : 2wp : yesflags : fpu vme de pse tsc msr mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2up pebs btsbogomips : 3408.43clflush size : 64

linux-mlpb:~ # cat /proc/cpuinfo

processor : 0vendor_id : GenuineIntelcpu family : 6model : 9model name : Intel(R) Pentium(R) M processor 1700MHzstepping : 8cpu MHz : 1694.501cache size : 1024 KBfdiv_bug : nohlt_bug : nof00f_bug : nocoma_bug : nofpu : yesfpu_exception : yescpuid level : 2wp : yesflags : fpu vme de pse tsc msr mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2up pebs btsbogomips : 3408.43clflush size : 64

QUESTION 63You have kdump service enabled on your Oracle Linux system and experience a kernel crash. The crashdump file is created on your system, but you are not aware where this crash file was created. Which twoplaces can you find the path information where the crash dump file is being generated on your system?

A. Check the settings in the /etc/kdump.conf file.B. Check the settings in the /etc/sysconfig/kdump.conf file.C. Check the target settings by running the system-config-kdump command.D. Check the settings in the /proc/sys/kernel/crash.conf file.


Explanation/Reference:A: When a kernel crash is captured, the core dump can be either stored as a file in a local file system,written directly to a device, or sent over a network using the NFS (Network File System) or SSH (SecureShell) protocol. Only one of these options can be set at the moment, and the default option is to store thevmcore file in the /var/crash/ directory of the local file system. To change this, as root, open the /etc/kdump.conf configuration file in a text editor and edit the options.

C: You can use the system-config-kdump GUI to setup Kdump:

QUESTION 64Which three statements are true about the Kickstart installation method?

A. The Kickstart installation method helps to speed boot time after the system restarts.B. A Kickstart file is created for every installation.C. The Kickstart Configurator can be used to create or make changes to a kickstart file.D. The Kickstart method allows for unattended and more standardized installations.E. The Kickstart method of configuration is performed after the installation of the host operating system.

Correct Answer: BCDSection: (none)Explanation

Explanation/Reference:BC:* A kickstart installation requires a kickstart file that contains the answers to every question asked during aninteractive installation. Kickstart files can be created in one of three ways:

/ Perform an interactive installation. Once complete you will find the Kickstart configuration file for theinstallation you just completed in the "/root/anaconda-ks.cfg" file. This can be amended and used forsubsequent installations. (B)/ Create a Kickstart file in a text editor manually, or based on a copy of a previous file./ Use the Kickstart Configurator. (C)

D:* Kickstart installations provide an automated alternative to the normal interactive installations of RHEL andOracle Linux. The automation of installation and post installation configuration steps represents aconsiderable time saving in situations where many similar installations are performed.

Reference: Kickstart - Automated Installations of RHEL and Oracle Linux

QUESTION 65A system administrator wants to view all running processes on the system in real time, to find out whatRAM has been allocating to each process. What system command should be used?

A. ps efB. ps axC. topD. meminfo


Explanation/Reference:top - display Linux tasksThe top program provides a dynamic real-time view of a running system. It can display system summaryinformation as well as a list of tasks currently being managed by the Linux kernel. The types of systemsum- mary information shown and the types, order and size of information displayed for tasks are all userconfigurable and that configuration can be made persistent across restarts.

Incorrect:Not A, Not B:ps displays information about a selection of the active processes.

To see every process on the system using standard syntax:ps -eps -efps -eFps -ely

To see every process on the system using BSD syntax:ps axps axu

Not D: meminfo - provide information about memory

The meminfo() function provides information about virtual and physical memory particular to the callingprocess. The user or developer of performance utilities can use this information to analyze system memoryallocations and develop a better understanding of the factors affecting application performance.

QUESTION 66You want to add a README.txt file in the home directory of every new user that you create by using theuseradd command on your Oracle Linux system. In which directory will you place the README.txt file sothat it automatically gets copied to the new user's home directory when the user is created?

A. /home/usersB. /etc/default/useraddC. /etc/defaultD. /etc/skel


Explanation/Reference:-k, --skel SKEL_DIRThe skeleton directory, which contains files and directories to be copied in the user's home directory, whenthe home directory is created by useradd. This option is only valid if the -m (or --create-home) option isspecified.

If this option is not set, the skeleton directory is defined by the SKEL variable in /etc/default/useradd or, by

default, /etc/skel.

Note:* useradd - create a new user or update default new user information

Reference: man useradd

QUESTION 67Identify the two kernels that are shipped with Oracle Linux 6.

A. Unbreakable Enterprise KernelB. Unbeatable Enterprise Kernel 11gC. Red Hat Compatible KernelD. Linux Compatible KernelE. Solaris 11 Container Kernel


Explanation/Reference:Oracle Linux 6 ships with two sets of kernel packages:* Unbreakable Enterprise Kernel [kernel-uek-2.6.32-100.28.5.el6] Only available on the x86_64 (64 bit)platformInstalled and booted by default* Red Hat compatible Kernel [kernel-2.6.32-71.el6]Installed by default

Reference: Oracle Linux 6 Release Notes

QUESTION 68View the exhibits.

Examine the output of sar command and the top command in the Exhibits. Which statement is the correctinterpretation of this data?

A. The system is running low on swap space and memory.B. CPU is Idle and the system has plenty of free memory available.C. The CPU utilization is high and one process is using most of the CPU.D. The system is idle with very little memory, CPU, and I/O utilization.


Explanation/Reference:From the top exhibit we see that npviewer.gin uses 73.4% of the available CPU.

Note:* sar - Collect, report, or save system activity information.

* The sar command writes to standard output the contents of selected cumulative activity counters in theoperating system. The accounting system, based on the values in the count and interval parameters, writesinformation the specified number of times spaced at the specified intervals in seconds.

* sar u 2 5Report CPU utilization for each 2 seconds. 5 lines are displayed.

QUESTION 69Which three steps are involved in the installing Ksplice on servers that will be updated?

A. You have to be logged as user "ksplice" on the server you want to prepare and install Oracle Ksplice on.B. The Uptrack package needs access directly or through a proxy to the Oracle public yum repository

(http://public-yum.oracle.com/) to download the required packages for the uptrack-* utilities to be able towork correctly.

C. Download the install-uptrack script using the "wget N http://www.ksplice.com/uptrack/install-uptrack"command.

D. You have to be logged in as user "root" on the server you want to prepare and install Oracle ksplice on.E. The uptrack package will set up a yum repository (/etc/yum.repos.d/ksplice-uptrack.repo) and download

the required package for the uptrack-* utilities to be able to work correctly.F. Download the ksplice ISO image from https://edelivery.oracle.com/linux and then run the "sh install-

uptrack" script from the ISO image.

Correct Answer: BCDSection: (none)Explanation

Explanation/Reference:B: Your system must have access to the internet to install Ksplice. If you are using a proxy, set the proxy inyour shell:

export http_proxy=http://proxy.company.com:portexport https_proxy=http://proxy.company.com:port

CD: Once you have an access key run the following commands as root, replacing YOUR_ACCESS_KEYwith the access key you received upon sign-up:

wget -N https://www.ksplice.com/uptrack/install-uptrack sh install-uptrack YOUR_ACCESS_KEYuptrack-upgrade y

E: If you'd like Ksplice Uptrack to automatically install updates as they become available, run:

sh install-uptrack YOUR_ACCESS_KEY --autoinstallin place of the above install-uptrack command, or set "autoinstall = yes" in your /etc/uptrack/uptrack.confafter installation.

Reference: Ksplice, Installation instructions

QUESTION 70Identify three valid modes for SELinux.

A. DisabledB. EnforcingC. RunningD. PermissiveE. EnabledF. High_levelG. Label_only

Correct Answer: ABDSection: (none)Explanation

Explanation/Reference:SELinux has three modes:Enforcing: SELinux policy is enforced. SELinux denies access based on SELinux policy rules. Permissive:SELinux policy is not enforced. SELinux does not deny access, but denials are logged for actions thatwould have been denied if running in enforcing mode. Disabled: SELinux is disabled. Only DAC rules areused.

QUESTION 71Which two features are available with the Unbreakable kernel R2, but not with the Red Hat CompatibleKernel?

A. Oracle Clusterware for LinuxB. Up to 4-petabyte cluster volumes with OCFS2C. Ksplice zero downtime patching

D. Transparent Huge Pages support (that is, 2 MB instead of 4 KB)

Correct Answer: ABSection: (none)Explanation



Oracle's Unbreakable Enterprise KernelKEY FEATURES:* Modern kernel based on 2.6.32,optimized by Oracle for serverdeployments* Includes OCFS (Oracle Cluster File System)2 1.6 for clustered volumes* Includes OFED 1.5.1* Advanced NUMA support* New diagnostic and tracing tools,including performance counters* Complete data integrity checking fromapplication to disk* Hardware fault management

Documents

Selftestengine.1z0-460.71 - · PDF fileFrom Oracle Metalink Support D. From Linux vendors such as Red Hat or SUSE E. ... Oracle VM, and Oracle VM Templates for both Linux and Solaris