Which of the following is an example of a real-time operating system (RTOS)? MCQ with Answer and Explanation

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Which of the following is an example of a real-time operating system (RTOS)?

A. VxWorks

B. Windows 10

C. Linux

D. Android

Answer: Option A

Solution (By JKSSB Mock Tests)

VxWorks is a real-time OS used in embedded systems requiring deterministic response times; general-purpose OSes are not RTOS.

This question belongs to: Computer Operating Systems

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Question #1

Which Linux command is used to display the full pathname of the current working directory?

A. cd

B. whoami

C. ls

D. pwd

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Correct Answer: Option D

Explanation:
The 'pwd' command stands for 'print working directory', which outputs the exact directory path that the user is currently interacting with.

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. nano (or vi/vim)

B. Bash

C. GIMP

D. LibreOffice

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Correct Answer: Option A

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

This question belongs to: Computer Operating Systems

Question #3

In Windows, the 'Device Manager' can be accessed by running which command?

A. sysdm.cpl

B. hdwwiz.cpl

C. devmgmt

D. devmgmt.msc

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Correct Answer: Option D

Explanation:
devmgmt.msc opens Device Manager; hdwwiz.cpl also opens the Add Hardware wizard.

This question belongs to: Computer Operating Systems

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