What is the purpose of the Android 'WallpaperManager'? MCQ with Answer and Explanation

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What is the purpose of the Android 'WallpaperManager'?

A. To control live wallpapers

B. To manage screen brightness

C. To change the theme

D. To set and manage the device's wallpaper

Answer: Option D

Solution (By JKSSB Mock Tests)

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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Question #1

In Windows, what type of administrative tool is 'Disk Management'?

A. An application to modify system registry paths.

B. An interface used to initialize, partition, and format local hard drives or solid-state drives.

C. A framework to analyze network packet drops.

D. A utility that cleans up web browser cache tracks.

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Correct Answer: Option B

Explanation:
Disk Management is a Windows system utility that enables users to perform advanced storage operations like creating partitions or changing drive letters.

This question belongs to: Computer Operating Systems

Question #2

Which of the following describes cooperative multitasking?

A. Each running process must explicitly yield control to let other processes run.

B. The operating system forcibly stops tasks using timer interrupts.

C. Hardware automatically manages scheduling without any operating system code.

D. Tasks are shared across multiple physical computers on a local area network.

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Correct Answer: Option A

Explanation:
In cooperative multitasking, the operating system never forces a context switch; instead, processes must manually yield CPU execution time back to the system scheduler.

This question belongs to: Computer Operating Systems

Question #3

Which administrative utility tool in Windows allows modification of advanced boot flags, startup configurations, and Safe Mode options via a GUI layout?

A. regedit

B. msconfig

C. cmd

D. cleanmgr

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Correct Answer: Option B

Explanation:
The 'msconfig' executable opens the System Configuration utility to customize boot parameters, startup services, and debugging constraints.

This question belongs to: Computer Operating Systems

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