Question

Process control block in operating system is defined as:

• A. Each process is represented in the operating system by a process control block (PCB)—also called a task control block.
• B. Process control block is used to store only process state.
• C. Process control block is used to control a block.
• D. Process control block tells us about logic behind process.

Hint:

The PCB is essential for process management and stores all the information required for the operating system to manage the process lifecycle.

Answer 1

The Correct Option is A

The **Process Control Block (PCB)** is a data structure used by the operating system to store information about a process. It holds various details such as process state, program counter, CPU registers, memory management information, and I/O status. It is a critical part of process management.

Step 1: Evaluate the options. - **Option 1** is the correct definition, as the PCB represents a process in the operating system. - **Option 2** is incorrect because the PCB stores more than just the process state; it stores other information like registers and I/O status. - **Option 3** is incorrect; the PCB doesn't control a block. - **Option 4** is incorrect because the PCB does not tell the logic behind the process. Thus, the correct answer is option **1**.