1.2 Operating System Functions, Chapter 1 - Intro Operating System:, , HSSC-II (12th Class) Computer Science Key Point Notes

12th Class (HSSC-II) Computer SLO Based Key Point Notes

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Unit 1: OPERATING SYSTEM

1.2: Operating System Functions

Block diagram of Operating System Functions

Operating System Functions

The following are the functions performed by the operating system:

1. Process Management

A process is a program in execution.

2. Memory Management

It is a part of the OS that controls and manages the operations of main memory.

3. File Management

• It is a part of the OS that manages files and folders on storage devices such as hard disks, USB flash drives CDs/DVD,s etc.
• It allows the users to perform operations such as copying, creating, moving, renaming deleting, and searching files and folders.
• It also allows the user to perform read, write open, and close operations on file folders.

4. I/O Management

• It is the part of OS that controls all the I/O operations during program execution.
• It manages all the INPUT/OUTPUT operations of I/O and storage devices.
• The user communicates with a computer with different I/O devices i.e. Keyboard, Mouse, Monitor, etc.
• It also detects and handles errors during data transmission.

5. Secondary Storage Management

• It is the part of the OS that manages free space and storage allocation of user programs and data on secondary storage devices.
• It also allocates and deallocates the storage space to user programs.

6. Network Management

• It is the part of OS the that monitors and manages the resources of a network.
• It allows to creation of user groups and assigns privileges to them.
• It shares the network resources among users and detects and fixes network problems.

7. Protection System

It is the part of the OS that ensures 

8. Command Interpreter

• It is part of the OS that provides an interface between the user and the computer system.
• It is a file in OS that reads and executes user commands entered as text through the keyboard.
• For example, WINDOWS OS uses the cmd.exe file as a command interpreter.

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1.1.1 Introduction to Operating System:
1.1.2 Commonly Used Operating Systems
1.1.3 Types of Operating Systems
1.1.4 Single User and Multiuser Operating Systems
1.2: Operating System Functions
1.3.1 Process Definition:
1.3.2 Various States of a Process
1.3.3 Thread and Process
1.3.4 Multithreading:
1.3.5 Multitasking:
1.3.4 Multithreading:

Chapter 1 (Complete Key Point Notes)

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