Which Windows feature allows you to revert the system to a previous state without affecting personal files? MCQ with Answer and Explanation

Question
Which Windows feature allows you to revert the system to a previous state without affecting personal files?
A. File History
B. Backup and Restore
C. System Restore
D. Reset this PC
Answer: Option C
Solution (By JKSSB Mock Tests)
System Restore restores system files and settings to a previous restore point, preserving personal documents.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
In Windows, what is the maximum file size limit supported natively by the older FAT32 file system?
A. 2 GB
B. 4 GB
C. 16 GB
D. unlimited
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Correct Answer: Option B

Explanation:
The FAT32 file system carries a strict architectural limitation where single individual files cannot exceed 4 GB in size.
This question belongs to: Computer Operating Systems
Question #2
Which Linux command is used to send a signal to a process, often to terminate it?
A. kill
B. term
C. signal
D. stop
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Correct Answer: Option A

Explanation:
kill sends a signal to a process; by default, SIGTERM terminates it; use kill -9 for forced termination.
This question belongs to: Computer Operating Systems
Question #3
What is the purpose of the Android 'KeyguardManager'?
A. To manage the lock screen and keyguard state
B. To manage biometric authentication
C. To handle screen locking
D. To manage device passwords
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Correct Answer: Option A

Explanation:
KeyguardManager controls the lock screen (keyguard) and allows apps to disable the keyguard temporarily.
This question belongs to: Computer Operating Systems
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