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

Question
What is the purpose of the Android 'WallpaperService'?
A. To draw wallpapers
B. To set wallpapers
C. To create live wallpapers that run as a service
D. To manage wallpapers
Answer: Option C
Solution (By JKSSB Mock Tests)
WallpaperService is the base class for live wallpapers, enabling animations and interactive backgrounds.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
Which Windows 11 feature allows users to organize open windows into distinct spatial arrangements on the screen to optimize multitasking?
A. Dynamic Refresh Rate
B. Snap Layouts
C. Virtual Desktops
D. Windows Hello
Discuss
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Correct Answer: Option B

Explanation:
Snap Layouts allow users to organize multiple application windows across different layout zones on a display screen.
This question belongs to: Computer Operating Systems
Question #2
Which Linux command is used to check the disk space usage of the root file system?
A. fdisk -l
B. df -h /
C. lsblk /
D. du -sh /
Discuss
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Correct Answer: Option B

Explanation:
df -h / shows used/available space on the root partition; du -sh / calculates total size of all files under /, which is heavy.
This question belongs to: Computer Operating Systems
Question #3
What is the difference between a 32-bit and 64-bit operating system?
A. The amount of memory they can address
B. The number of users they support
C. The file system used
D. The speed of the processor
Discuss
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Correct Answer: Option A

Explanation:
The main difference is the addressable memory space; 64-bit can address much more than 4 GB.
This question belongs to: Computer Operating Systems
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