Which Linux command is used to display the system's current runlevel? MCQ with Answer and Explanation

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Which Linux command is used to display the system's current runlevel?

A. systemctl get-default

B. All of the above

C. runlevel

D. who -r

Answer: Option B

Solution (By JKSSB Mock Tests)

runlevel and who -r show the current and previous runlevel; systemctl get-default shows default target.

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Question #1

Which Linux command is used to set the system's hostname?

A. sysctl

B. hostname

C. hostnamectl

D. set-hostname

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Correct Answer: Option B

Explanation:
hostname can display or set the system's hostname; hostnamectl is also used in systemd.

This question belongs to: Computer Operating Systems

Question #2

In Windows, the 'Registry' value type 'REG_DWORD' represents:

A. A binary value

B. A 64-bit integer

C. A 32-bit integer

D. A string

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Correct Answer: Option C

Explanation:
REG_DWORD is a 32-bit numeric value; REG_QWORD is 64-bit; REG_SZ is string; REG_BINARY is binary.

This question belongs to: Computer Operating Systems

Question #3

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

A. Disk partition management

B. Disk formatting

C. Disk defragmentation

D. Disk cleanup

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Correct Answer: Option A

Explanation:
diskpart is a command-line utility for managing disk partitions, volumes, and dynamic disks.

This question belongs to: Computer Operating Systems

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