Which Linux command is used to change the password of the current user? MCQ with Answer and Explanation

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Which Linux command is used to change the password of the current user?

A. passwd

B. chpasswd

C. password

D. usrpasswd

Answer: Option A

Solution (By JKSSB Mock Tests)

passwd without arguments changes the current user's password; chpasswd is for batch changes.

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Question #1

Which Linux command is used to display the first few lines of a file?

A. more

B. head

C. tail

D. less

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Correct Answer: Option B

Explanation:
head shows the first 10 lines by default; tail shows the last lines.

This question belongs to: Computer Operating Systems

Question #2

Which fundamental principle is used by an operating system to prevent user applications from directly overwriting or damaging crucial system code?

A. Dynamic Link Libraries

B. Spooler Buffering

C. Disk Defragmentation

D. Dual-Mode Operation (User Mode vs. Kernel Mode)

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Correct Answer: Option D

Explanation:
Dual-mode operation provides hardware-level protection by separating execution into restricted User Mode (for user apps) and privileged Kernel Mode (for the OS kernel).

This question belongs to: Computer Operating Systems

Question #3

In Windows, the 'Telnet' command is used for:

A. Network file transfer

B. Web browsing

C. Email communication

D. Remote command-line access to another host

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Correct Answer: Option D

Explanation:
Telnet is a protocol for remote login to a host; it's not secure and often disabled.

This question belongs to: Computer Operating Systems

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