CUET PG 2026 — operating system os PYQ

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Question

CUET PG 2026 — operating system os PYQ

CUET PG | operating system os | 2026

Assertion (A): A Process Control Block (PCB) is essential for process switching in a multiprogramming operating system.

Reason (R): The PCB stores the process state, program counter, and CPU registers, allowing the OS to resume the process from the exact point it was interrupted.

Choose the correct answer:

Explanation

Assertion (A) is True: In a multiprogramming operating system, the CPU frequently switches between multiple processes (context switching). To perform this switch without losing process data, a Process Control Block (PCB) is essential.
Reason (R) is True: The PCB stores critical information including the process state, program counter, and CPU registers so that the operating system can seamlessly resume the process from the exact point it was interrupted.
Correct Explanation: Reason (R) provides the exact justification for why Assertion (A) is true; storing these execution details in the PCB is precisely what enables successful process switching.