Process Definition, Chapter 1 - Operating System

Computer Science SLO Based Key Point Notes

👉👉👉Computer Science 12th Class Notes (Main Page)

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Unit 1: OPERATING SYSTEM

1.3. Process Management 

1.3.1 Process Definition:

• A process is a program in execution.
• When a program is loaded in main memory for execution, it becomes a process.
• A program is an executable code that is stored in disk as a text file whereas a process is a dynamic instance of a program during its execution in RAM. 
• It represents the basic unit of work. 
• It uses different resources of the computer such as CPU time, I/O devices, memory, etc.

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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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👉👉👉Computer Science 12th Class Notes (Main Page)

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(National Book Foundation - As Federal Textbook Board, Islamabad 

Based on National Curriculum Pakistan 2026-2027 and Onward prescribed by Federal Board of Intermediate and Secondary Education, Islamabad, and All Pakistan Boards) 

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