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): Copy-on-Write (COW) allows both parent and child processes to initially share the same pages in memory during a fork() operation.

Reason (R): If a process attempts to read from a shared COW page, the operating system instantly duplicates the entire physical page prior to granting read access.

Choose the correct answer:

Explanation

Assertion (A) is True: Copy-on-Write (COW) is a resource-management technique used by operating systems where a fork() operation creates a child process that initially shares the parent's memory pages without copying them.
Reason (R) is False: Multiple processes can safely read from a shared Copy-on-Write page simultaneously without duplicating it. The operating system only creates a duplicate physical page when a process attempts to write (modify) the page.