Which Linux command is used to change the group ownership of a file? MCQ with Answer and Explanation

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Which Linux command is used to change the group ownership of a file?

A. groupmod

B. chgrp

C. chown

D. chmod

Answer: Option B

Solution (By JKSSB Mock Tests)

chgrp changes the group ownership of a file or directory; chown can change both owner and group.

This question belongs to: Computer Operating Systems

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Question #1

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Which of the following is a type of scheduler that selects the next process to run from the ready queue?

A. I/O scheduler

B. Short-term scheduler (CPU scheduler)

C. Long-term scheduler (job scheduler)

D. Medium-term scheduler

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Correct Answer: Option B

Explanation:
The short-term scheduler selects a process from ready queue and dispatches it to the CPU; occurs frequently.

This question belongs to: Computer Operating Systems

Question #2

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Which execution environment layer in Android handles core operations like memory management, thread orchestration, and garbage collection for modern apps?

A. Linux Kernel Core

B. Hardware Abstraction Layer

C. Dalvik Cache Engine

D. Android Runtime (ART)

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Correct Answer: Option D

Explanation:
ART (Android Runtime) serves as the managed execution environment for modern Android applications, handling execution and garbage collection.

This question belongs to: Computer Operating Systems