Oracle 1Z0-064 Certification Online Practice

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    1Z0-064 ExamOracle Database 12c - Performance Management and Tuning

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    Oracle 1Z0-064 Certification ExamDescription

    At ipass4sures.com, we are here to help you in clearing your Oracle certification exam. You can easily pass 1Z0-064

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    Oracle 1Z0-064 Online PracticeExam

    They have carefully maintained exam structure, syllabus, time limit and scoring system same as actual Oracle

    certification exam. Our online practice exam contains more practical and case study based questions. These questionsare the most frequently asked in actual Oracle Database 12c: Performance Management and Tuning (1Z0-064)

    certification exam for Oracle Database 12c Performance Tuning Certified Expert (OCE) credential.

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    Why Choose 1Z0-064 CertificationPreparation?

    We have a dedicated team of Oracle certified experts who are having more than 10 years

    of experience on Oracle technology.

    Our structured and autonomous review system collects feedback and exam experience

    from recently certified candidates, based on those inputs our domain experts frequently

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    Our online practice exam is the exact match of actual Oracle Database 12c: Performance

    Management and Tuning certification exam for Oracle Database 12c Performance

    Tuning Certified Expert (OCE) credential that allows you to complete within a time

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    Oracle 12c PerformanceCertification Released to Beta

    The first of the new expert exams that I wrote about back in May

    has just entered beta. 1Z1-064: Oracle Database 12c: Performance

    Management and Tuning is the 12c update to the legacy exam 1Z0-

    054: Oracle Database 11g: Performance Tuning. The beta is

    currently scheduled to run until late February. Betas are often

    extended if not enough candidates take the exam by the original

    deadline to provide a good statistical sample. However, I expect this

    exam will be popular enough that the exam may close on its original

    deadline.

    I compared the topics of 1Z0-064 with 1Z0-054. Not surprisingly,

    the two lists are closely related, with the 12c exam being largely a

    refinement of the 11g incarnation. Some of the difference between

    the two exams include:

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    Oracle

    Exam 1z0-064Oracle Database 12c: PerformanceManagement and Tuning

    Version: Demo[ Total Questions: 10 ]

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    Oracle Pass4Sure 1Z0-064Practice Test

    Question No : 1

    You are administering a database that supports an OLTP workload. CURSOR_SHARING is set to EXACT for the instance.

    An application is frequently executing almost identical queries that vary in literal values in the WHERE clause, causing a

    large number of hard parses to occur. Which four statements would be true if you use bind variables for these queries?

    (Choose four.)

    A. Mutex contention in the library cache will be reduced.

    B. The optimizer will use one parent cursor and one child cursor for each SQL statement with different literal values.

    C. Hard parses will be reduced for the queries.

    D. The optimizer will use bind peeking and subsequent execution of the queries will always generate the same plans

    irrespective of the cardinality.E. The optimizer will generate the same plan for all bind values if no histograms exist on the columns used in the WHERE

    clause of these queries.

    F. The optimizer will use bind peeking and use the literal value to determine the execution plan for these queries.

    Answer: A C D E

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    Oracle Pass4Sure 1Z0-064Practice Test

    Question No : 2

    Answer: A B C

    You are administering a database that supports a mixed workload. You upgrade your database from Oracle Database 11g to 12c and after the upgrade, users

    complain about degraded performance of some queries. The SQL plan baselines imported from the previous version are present for the queries and are loaded

    to the SQL Management Base as accepted plans. On further investigation, you find that better plans are generated but not used by the optimizer.

    Examine the parameters set for the instance:

    Which three tasks would you perform to improve the performance of these queries?

    (Choose three.)

    A. Gather statistics for the objects used in the queries.

    B. Use the DBMS_SPM.EVOLVE_SQL_PLAN_BASELINE function to evolve new plans and fix the plans for the statements.

    C. Create an SQL Tuning Set (STS) and run it through the SQL Access Advisor to generate recommendations.

    D. Create an STS and run it through the SQL Tuning Advisor to generate recommendations.

    E. Set the OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES parameter to TRUE.

    F. Use the DBMS_SPM.ALTER_SQL_PLAN_BASELINE function to alter the accepted plans as fixed plans.a

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    Oracle Pass4Sure 1Z0-064Practice Test

    Question No : 3

    Answer: A

    Examine the command to change a parameter value from the default to 50:

    SQL> ALTER SYSTEM SET OPTIMIZER_INDEX_COST_ADJ = 50;

    What is the effect of changing the value of the parameter?

    (Choose the best answer.)

    A. It influences the optimizer to use full table scans instead of index scans as the estimated cost of full table scan is

    reduced.

    B. It influences the optimizer to use bitmap indexes as the estimated cost of conversion from bitmap to rowid is reduced.

    C. It influences the optimizer to always use fast full index scans as the estimated cost of using an index is reduced.

    D. It influences the optimizer to use indexes instead of full table scans as the estimated cost of using an index is reduced.

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    Oracle Pass4Sure 1Z0-064Practice Test

    Question No : 4

    Answer: A

    Your database supports multiple applications. The applications run on the middle tier and use connection pooling for connecting to the

    database. You notice that the sessions created by the applications are competing for resources. You want to statistically measure the workload

    and set priorities. What action must you perform to achieve this?

    (Choose the best answer.)

    A. Create services for the applications and set a relative priority by assigning them to application users and using the

    DBMS_MONITOR.SERV_MOD_ACT_TRACE_ENABLE

    procedure to trace the services.

    B. Create services for the applications and set a relative priority by assigning them to application users and using the

    DBMS_MONITOR.SESSION_TRACE_ENABLE procedure

    to trace the services.

    C. Create services for the applications and set the relative priority of services within an instance by mapping the services directly to consumer

    groups.

    D. Create services for the applications and set a relative priority by assigning them to application users.

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    Oracle Pass4Sure 1Z0-064Practice Test

    Question No : 5

    Answer: B E

    Which two actions can reduce library cache latch contention for an OLTP application that repeatedly executes

    queries containing a mix of literals and bind variables?

    (Choose two.)

    A. setting the OPEN_CURSORS parameter to hold a sufficient number of concurrently open cursors

    B. coding the application such that a frequently executed statement is parsed only once and executed repeatedly

    as required

    C. setting the CURSOR_SHARING parameter to EXACT

    D. avoiding the granting of privileges on objects associated with cursors during peak load

    E. enabling Automatic Memory Management and allocating at least 50% of the available memory for

    SHARED_POOL_SIZE

    F. configuring shared server connections

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    Oracle Pass4Sure 1Z0-064Practice Test

    Question No : 6

    Answer: A C

    Which two statements are true about ADDM or Real-Time ADDM? (Choose two.)

    A. ADDM can be run manually by selecting any range of AWR snapshots available within the AWR retentionperiod, provided they do not cover a time period when the instances

    were restarted.

    B. ADDM runs in Partial mode to analyze any hung database issues.

    C. Real-Time ADDM can proactively detect and diagnose transient performance issues that last for a few

    seconds.

    D. Real-Time ADDM is automatically invoked by ADDM at the end of every hour.

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    Oracle Pass4Sure 1Z0-064Practice Test

    Question No : 7

    Answer: A B E F

    You are administering a database that supports an OLTP workload. An application performs a large number of small

    transactions. Users complain about increased response times for transactions. On investigation, you find that the cache hit

    ratio is 69%. Examine a partial output from V$SYSTEM_EVENT:

    Which four can be possible reasons for the increased response time? (Choose four.)

    A. The database buffer cache is inadequately sized.

    B. DBWR is not writing the dirty buffers fast enough.

    C. A large number of blocks are fetched from disks frequently.

    D. Several full table scans are performed by transactions.

    E. Blocks are aging out of the buffer cache frequently.

    F. Many sessions are waiting for buffers that are currently being read into the buffer cache by other sessions.

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    Oracle Pass4Sure 1Z0-064Practice Test

    Question No : 8

    Answer: B D E

    Which three methods can you use to create a pre-change SQL trial to capture performance data by using

    SQL Performance Analyzer?

    (Choose three.)

    A. executing SQL statements in an SQL Tuning Set (STS) on a test database by using database links to

    the production database.

    B. generating only execution plans on a test database without actually running SQL statements.

    C. generating an execution plan and statistics for selective SQL statements captured in an STS

    D. loading performance data and execution plans from an STS.

    E. generating both execution plans and statistics for each SQL statement in an STS by actually running

    the SQL statements on a test database.

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    Oracle Pass4Sure 1Z0-064Practice Test

    Question No : 9

    Answer: B D

    Examine an extract from a PGA Memory Advisory for your database:

    Which two inferences are correct? (Choose two)

    A. Automatic management of PGA memory is disabled.

    B. The current PGA size requires the use of a temporary tablespace for sorting operations.

    C. The current PGA size is sufficient and does not require the memory manager to allocate more

    memory.

    D. PGA size should be increased at least four times its current size for significant improvement in

    performance and disk space management.

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    Oracle Pass4Sure 1Z0-064Practice Test

    Question No : 10

    Answer: A D

    Which two statements are true about viewing the details of Real-Time Database Operations?

    (Choose two.)

    A. In V$SQL_MONITOR monitoring, statistics are cumulative over several executions of the SQL statement that is

    being monitored in a session.

    B. SQL Developer can be used to view running database operations.

    C. Oracle Enterprise Manager Database Express can be used to view running database operations.

    D. When the SQL statement that is being monitored is executing, V$SQL_MONITOR is refreshed once every

    minute. After the execution ends, the monitoring information in

    V$SQL_MONITOR is deleted immediately.

    E. Oracle Enterprise Manager Cloud Control can be used to view running database operations.

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