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

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

A. chown

B. chmod

C. chgrp

D. umask

Answer: Option B

Solution (By JKSSB Mock Tests)

The chmod (change mode) command modifies file permissions (read, write, execute) for owner, group, and others.

This question belongs to: Computer Operating Systems

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Which Linux command is used to show the system's current date and time?

A. timedatectl

B. time

C. date

D. clock

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Correct Answer: Option C

Explanation:
date displays and sets the system date/time; timedatectl is systemd's tool for date/time management.

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What is the primary difference between UEFI and BIOS?

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Correct Answer: Option A

Explanation:
UEFI replaces BIOS with advanced features like Secure Boot, faster boot, and support for large disks.

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In Linux, the 'lsblk' command is used to:

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Correct Answer: Option B

Explanation:
lsblk shows all block devices, their sizes, and mount points in a hierarchical view.

This question belongs to: Computer Operating Systems

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