Which Linux command is used to set or change the system's time zone? MCQ with Answer and Explanation

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Which Linux command is used to set or change the system's time zone?

A. date -s

B. tzselect

C. timezone

D. timedatectl

Answer: Option D

Solution (By JKSSB Mock Tests)

timedatectl set-timezone is the modern systemd command; tzselect is interactive but only sets environment.

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What is the main purpose of the Android 'System UI'?

A. To run background services

B. To provide settings interface

C. To manage the status bar, notifications, and navigation

D. To handle app permissions

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Correct Answer: Option C

Explanation:
System UI is a core component that renders the status bar, navigation keys, and notifications, and handles system-level user interactions.

This question belongs to: Computer Operating Systems

Question #2

Which of the following is the primary function of an operating system?

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C. To manage hardware resources and provide services for application software

D. To execute user applications directly without hardware interaction

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Correct Answer: Option C

Explanation:
The OS manages hardware resources (CPU, memory, I/O) and provides services to applications, acting as an intermediary.

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Question #3

What is the purpose of the Android 'WallpaperManager'?

A. To manage screen brightness

B. To set and manage the device's wallpaper

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Correct Answer: Option B

Explanation:
WallpaperManager provides methods to set the home screen or lock screen wallpaper from resources or bitmap.

This question belongs to: Computer Operating Systems

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