Antivirus & Firewall MCQs
Antivirus & Firewall MCQs
With Answers & Detailed Explanations (As Per NCERT Syllabus)
Class: 9 |
Subject: Computer Science |
Section: Computer Security & Data Protection |
Topic: Antivirus & Firewall |
Board: CBSE Board Examination
Q1. Antivirus software is used to:
Answer: B
Antivirus programs scan, detect, prevent, and remove malicious software from computer systems.
Antivirus programs scan, detect, prevent, and remove malicious software from computer systems.
Q2. A firewall is:
Answer: B
Firewall monitors and controls incoming and outgoing network traffic based on security rules.
Firewall monitors and controls incoming and outgoing network traffic based on security rules.
Q3. Antivirus protects against:
Answer: A
It protects systems from viruses, worms, Trojans, spyware, and other threats.
It protects systems from viruses, worms, Trojans, spyware, and other threats.
Q4. Firewall works as a:
Answer: A
Firewall acts like a gatekeeper controlling data entering or leaving the network.
Firewall acts like a gatekeeper controlling data entering or leaving the network.
Q5. Real‑time protection means:
Answer: B
Real‑time protection monitors threats continuously as files are opened or downloaded.
Real‑time protection monitors threats continuously as files are opened or downloaded.
Q6. Updating antivirus is important to:
Answer: B
Updates add new virus definitions for latest threats.
Updates add new virus definitions for latest threats.
Q7. Firewall prevents:
Answer: A
It blocks suspicious or unauthorized connections.
It blocks suspicious or unauthorized connections.
Q8. Example of antivirus software:
Answer: A
Windows Defender is built‑in antivirus protection.
Windows Defender is built‑in antivirus protection.
Q9. Firewall can be:
Answer: A
Firewalls exist as devices or programs.
Firewalls exist as devices or programs.
Q10. Scanning means:
Answer: B
Scanning analyzes files for malware signatures.
Scanning analyzes files for malware signatures.
Q11. Quick scan checks:
Answer: B
Quick scan focuses on common infection areas.
Quick scan focuses on common infection areas.
Q12. Full scan checks:
Answer: B
Full scan examines all drives and files.
Full scan examines all drives and files.
Q13. Firewall filters:
Answer: B
It filters packets based on rules.
It filters packets based on rules.
Q14. Antivirus uses:
Answer: A
Signatures help identify known malware.
Signatures help identify known malware.
Q15. Enabling firewall is:
Answer: B
Firewall adds an extra security layer.
Firewall adds an extra security layer.
Q16. Antivirus quarantine means:
Answer: B
Quarantine isolates threats safely.
Quarantine isolates threats safely.
Q17. Firewall protects mainly:
Answer: A
It secures network communication.
It secures network communication.
Q18. Best practice is:
Answer: B
Updated tools ensure maximum protection.
Updated tools ensure maximum protection.
Q19. Firewall logs record:
Answer: A
Logs track allowed and blocked traffic.
Logs track allowed and blocked traffic.
Q20. Antivirus + Firewall together provide:
Answer: B
They create multi‑layer protection against threats.
They create multi‑layer protection against threats.
