List-I (IPC Mechanism): A. Shared Memory B. Message Passing C. Ordinary Pipes D. Named Pipes (FIFOs) List-II (Architectural Property): Kernel acts as intermediary; lower data sizes via system calls Fast, direct address access; synchronization managed by user code Unidirectional data stream; requires a parent-child relationship Bidirectional communication; can connect unrelated processes

A-2, B-1, C-3, D-4 Explanation: A. Shared Memory (2): Provides fast and direct access to memory addresses shared between processes. System calls are only needed to set up the shared memory; after that, synchronization must be explicitly managed by user code. B. Message Passing (1): Useful for exchanging smaller amounts of data where the OS kernel acts as an intermediary, passing messages using system calls. C. Ordinary Pipes (3): Allow unidirectional communication (one-way data stream) and require a parent-child or related process hierarchy to establish communication. D. Named Pipes / FIFOs (4): Support bidirectional communication and can exist as actual files on the filesystem, allowing unrelated processes to communicate. Correct Matching: A 2 B 1 C 3 D 4

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CUET PG 2026 — operating system os PYQ

CUET PG | operating system os | 2026

List-I (IPC Mechanism):

A. Shared Memory

B. Message Passing

C. Ordinary Pipes

D. Named Pipes (FIFOs)

List-II (Architectural Property):

Kernel acts as intermediary; lower data sizes via system calls

Fast, direct address access; synchronization managed by user code

Unidirectional data stream; requires a parent-child relationship

Bidirectional communication; can connect unrelated processes

Choose the correct answer: