Which Linux terminal utility command is used to modify the password string associated with a user account profile? MCQ with Answer and Explanation

Question
Which Linux terminal utility command is used to modify the password string associated with a user account profile?
A. useradd
B. chmod
C. passwd
D. chown
Answer: Option C
Solution (By JKSSB Mock Tests)
The 'passwd' command allows users or administrative accounts to update or reset access passwords across Unix-like user groups.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
Which command in Windows is used to check the integrity of system files?
A. systeminfo
B. chkdsk
C. dism
D. sfc /scannow
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Correct Answer: Option D

Explanation:
System File Checker (sfc /scannow) scans and repairs corrupted system files in Windows.
This question belongs to: Computer Operating Systems
Question #2
In Windows, the 'Command Prompt' (cmd) uses which text encoding by default?
A. Unicode
B. ANSI
C. UTF-8
D. OEM code page (e.g., 850)
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Correct Answer: Option D

Explanation:
By default, Command Prompt uses the OEM code page (e.g., 850 or 437) for legacy compatibility; modern versions can use UTF-8 with /U switch.
This question belongs to: Computer Operating Systems
Question #3
In a multiprocessing system, what is the term for the ability to run multiple threads simultaneously on different cores?
A. Concurrency
B. Parallelism
C. Hyperthreading
D. Multithreading
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Correct Answer: Option B

Explanation:
Parallelism refers to executing multiple threads at the exact same time on multiple cores; concurrency is about managing multiple tasks with possible overlap.
This question belongs to: Computer Operating Systems
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