What is the primary purpose of virtual memory? MCQ with Answer and Explanation

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What is the primary purpose of virtual memory?

A. To increase CPU speed

B. To extend physical memory using disk storage

C. To reduce power consumption

D. To provide a permanent storage for files

Answer: Option B

Solution (By JKSSB Mock Tests)

Virtual memory uses a portion of the hard disk as an extension of RAM, allowing processes to use more memory than physically available.

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Practice More Operating Systems Questions

Question #1

In Linux, the 'lsblk' command is used to:

A. Display disk usage

B. List mounted file systems

C. List block devices (like disks and partitions) in a tree format

D. Show disk partitions only

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Correct Answer: Option C

Explanation:
lsblk shows all block devices, their sizes, and mount points in a hierarchical view.

This question belongs to: Computer Operating Systems

Question #2

In Windows, the 'PowerShell' command to get the current date is:

A. time

B. All of the above

C. date

D. Get-Date

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Correct Answer: Option B

Explanation:
Get-Date is PowerShell cmdlet; date and time are legacy commands; all display date/time.

This question belongs to: Computer Operating Systems

Question #3

Which Linux terminal command is used to display the lines of a file that match a specified keyword or regular expression?

A. echo

B. grep

C. find

D. cat

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Correct Answer: Option B

Explanation:
The 'grep' command stands for global regular expression print, designed to quickly filter out specific data strings from files or text feeds.

This question belongs to: Computer Operating Systems

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