Which Linux command displays information about system processes in real-time? MCQ with Answer and Explanation

Question
Which Linux command displays information about system processes in real-time?
A. ps
B. systemd
C. kill
D. top
Answer: Option D
Solution (By JKSSB Mock Tests)
The 'top' command shows a dynamic, real-time view of running processes, CPU usage, memory, and more.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
What is the purpose of the Windows 'Safe Mode'?
A. To load the last known good configuration
B. To boot with minimal drivers and services for troubleshooting
C. To run the system with maximum performance
D. To enable network support for recovery
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Correct Answer: Option B

Explanation:
Safe Mode loads only essential drivers and services, allowing users to diagnose and fix system issues caused by problematic software or drivers.
This question belongs to: Computer Operating Systems
Question #2
Which Linux command changes the file ownership designation from one user account to another?
A. chgrp
B. chmod
C. chown
D. passwd
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Correct Answer: Option C

Explanation:
The 'chown' command stands for change owner, used by administrators to alter individual user ownership assignments on files or folders.
This question belongs to: Computer Operating Systems
Question #3
Which of the following is a security feature in Windows that prevents unauthorized code from running?
A. BitLocker
B. Windows Defender
C. Windows Firewall
D. User Account Control (UAC)
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Correct Answer: Option D

Explanation:
UAC prompts users for permission when programs try to make system changes, preventing unauthorized actions.
This question belongs to: Computer Operating Systems
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