2.0 Basic OS Concept Management
Types of Interfaces
1. Command Interface2. Menu Interface3. Graphical User Interface4. Voice-actuated interface5. Web-form interface
Types of Interface : 1) Command Interface
Types of Interface : 1) Command Interface …cont
An interface that accepts types commands, one line at a time from the user
Contras with a menu – driven interface
E.g.: MS-DOS , UNIX operating system
Types of Interface : 1) Command Interface…cont
Types of Interface : 2) Menu Interface
Types of Interface : 2) Menu Interface…cont
An interface that accept instructions that user choose from menu of valid choice
User often use mouse to point & click on the chosen instruction
Contrast with a command-driven interface
E.g.: Windows 2000
Types of Interface : 2) Menu Interface…cont
Types of Interface : 3) Graphical User Interface
Types of Interface : 3) Graphical User Interface…cont
A user interface that allows the user to activate OS command by clicking on a desktop icon using pointing device such as mouse or touch screen.
GUIs evolved from command –driven user interface.
User often use mouse to point & click on the chosen
Types of Interface : 3) Graphical User Interface…cont
Types of Interface : 4) Voice-Actuated Interface
Enables a user to use simple voice command to control physical environmental.
E.g.: The computer includes a voice card & associated voice recognition & training software for interpreting & translating voice input into digital information readable by controller card for operating equipments @ control the environment.
Types of Interface : 5) Web-form Interface
Types of Interface : 5) Web-form Interface…cont
Allow user to enter data that is send to a server for processing
Web form interface resembles paper form because user need to fill out the form using web form elements
Types of Interface : 5) Web-form Interface…cont
Basic Functions Perform by OS User Interface
1. Enable user to interact with the system
2. How to interact? By perform the user command interface /instructions from various types of interfaces.
3. Medium are used ; display screen, keyboard, mouse, light pen, the appearance of a desktop, illuminated characters or help messages.
Boot Process
Booting up is a bootstrapping process that starts OS when the user turns on a computer system
Booting is the process of starting or restarting a computer
Type of Boot Process
1. Cold Boot
2. Warm Boot
Type of Boot Process : Cold Boot
When turning on a computer that has been powered off completely.
Example : by press power button.
Type of Boot Process : Warm Boot
Is the process of restarting a computer that already is powered on.
Example : In Windows XP, warm boot can be perform by :
pressing combination of (CTRL + ALT +DEL) selecting a button or an option from a list in a
dialog box pressing the reset button on the computer
How a PC Boots Up
1. The power supply send a signal to the component s in the system unit
2. The processor finds the ROM chip(s) that contain the BIOS (basic input output system)
3. The BIOS performs the POST(power-on self test), which checks components such as mouse, keyboard and adapter cards.
4. The results of the POST are compared with data in a CMOS chip
5. The BIOS looks for the system file in drive A (floppy disk drive), sometimes a CD or DVD drive & then drive C (hard disk)
6. The system file and the kernel of the OS load into memory (RAM) from storage (hard disk)
7. The OS loads configuration information, may request user information & display the desktop on the screen.
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