What is the main purpose of the Android 'System UI'? MCQ with Answer and Explanation

Question
What is the main purpose of the Android 'System UI'?
A. To run background services
B. To manage the status bar, notifications, and navigation
C. To handle app permissions
D. To provide settings interface
Answer: Option B
Solution (By JKSSB Mock Tests)
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
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Practice More Operating Systems Questions

Question #1
Which Windows command is used to display the IP configuration and release/renew DHCP leases?
A. All of the above
B. ipconfig /release and /renew
C. ipconfig /all
D. ipconfig /flushdns
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Correct Answer: Option A

Explanation:
ipconfig supports various options: /all for full info, /release and /renew for DHCP, and /flushdns for DNS cache.
This question belongs to: Computer Operating Systems
Question #2
Which system state preserves open documents and applications to the hard drive or SSD, and then shuts down power completely?
A. Sleep Mode
B. Restart Mode
C. Log Off Mode
D. Hibernate Mode
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Correct Answer: Option D

Explanation:
Hibernate mode saves current system state data directly onto the hard disk (hiberfil.sys) and powers off the machine completely, consuming zero electricity.
This question belongs to: Computer Operating Systems
Question #3
Which of the following is a technique used to reduce fragmentation in memory?
A. Segmentation
B. Compaction
C. Swapping
D. Paging
Discuss
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Correct Answer: Option B

Explanation:
Compaction moves processes to create contiguous free space, reducing external fragmentation; paging eliminates external fragmentation.
This question belongs to: Computer Operating Systems
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