Which Linux command is used to display the last reboot time? MCQ with Answer and Explanation

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Which Linux command is used to display the last reboot time?

A. last reboot

B. uptime -s

C. All of the above

D. who -b

Answer: Option C

Solution (By JKSSB Mock Tests)

last reboot shows reboot history; uptime -s shows system start time; who -b shows boot time.

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What is the purpose of the Android 'UsbManager'?

A. To control USB charging

B. To manage USB device connections and communication

C. To detect USB devices

D. To manage USB storage

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Correct Answer: Option B

Explanation:
UsbManager provides access to USB devices connected to the Android device, allowing communication via USB.

This question belongs to: Computer Operating Systems

Question #2

Which Linux terminal tool is traditionally used to modify or edit configuration text files directly within the terminal screen without a GUI?

A. Bash

B. nano (or vi/vim)

C. LibreOffice

D. GIMP

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Correct Answer: Option B

Explanation:
'nano', 'vi', and 'vim' are classic text editor utilities that operate natively within terminal interfaces to configure text files.

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Question #3

Which Linux command is used to delete a file from the file system permanently?

A. remove

B. mv

C. rm

D. del

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Correct Answer: Option C

Explanation:
The 'rm' command stands for remove and is used to delete files or directories in Unix-like terminal shells.

This question belongs to: Computer Operating Systems

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