What is the purpose of a digital signature? MCQ with Answer and Explanation

What is the purpose of a digital signature?
A. To encrypt a message
B. To speed up message delivery
C. To compress a message
D. To verify the authenticity and integrity of a message
Answer: Option D
Solution (By JKSSB Mock Tests)
A digital signature provides authentication and integrity verification, ensuring that a message or document comes from the claimed sender and has not been altered.

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Practice More Cyber Security Questions

Question #1
A piece of software code that remains hidden and completely inactive inside a corporate server until an executive's account deletion triggers its destructive routine is a:
A. Macro Virus
B. Computer Worm
C. Logic Bomb
D. Rootkit Module

Correct Answer: Option C


Explanation:
Logic bombs are snippets of malicious code hidden within legitimate software programmed to activate only when specific conditions are met.

This question belongs to: Computer Cyber Security
Question #2
Which of the following is a type of cyber attack that involves intercepting and altering communications between two parties?
A. Phishing
B. Man-in-the-middle (MITM)
C. Denial-of-service
D. SQL injection

Correct Answer: Option B


Explanation:
In a man-in-the-middle attack, the attacker secretly intercepts and possibly alters the communication between two parties who believe they are directly communicating with each other.

This question belongs to: Computer Cyber Security
Question #3
A specialized tool that not only detects active network intrusions but also automatically reconfigures firewall rules to block the attacker’s source IP address immediately is a/an:
A. Proxy Server Gateway
B. Intrusion Prevention System (IPS)
C. Intrusion Detection System (IDS)
D. Cryptographic Hash Verifier

Correct Answer: Option B


Explanation:
An IPS builds on standard IDS capabilities by proactively blocking or neutralizing detected threats in real time.

This question belongs to: Computer Cyber Security