Which utility software is used to protect a computer from viruses? MCQ with Answer and Explanation

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Which utility software is used to protect a computer from viruses?

A. Backup software

B. Firewall

C. Antivirus

D. Disk Cleanup

Answer: Option C

Solution (By JKSSB Mock Tests)

Antivirus software detects, prevents, and removes malicious software.

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Practice More Computer Software Questions

Question #1

What is the difference between a system call and a library call?

A. Library call invokes kernel; system call is user-space

B. System call is for files; library call is for network

C. System call invokes kernel; library call is user-space

D. They are the same

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Correct Answer: Option C

Explanation:
System calls request services from the OS kernel; library calls are in user-space.

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Question #2

What form of malicious software is designed to encrypt a user's files, rendering them inaccessible until a decryption key fee is paid?

A. Adware

B. Ransomware

C. Trojan Horse

D. Spyware

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Correct Answer: Option B

Explanation:
Ransomware is malware that hijacks user files via encryption, demanding payment to restore access. Security utilities work to block it.

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Question #3

What is the purpose of a software emulator?

A. To mimic one system on another

B. To compile code

C. To link libraries

D. To manage memory

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Correct Answer: Option A

Explanation:
Emulators allow software to run on incompatible hardware or OSes.

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