Types of Computer Threats MCQs
Types of Computer Threats MCQs
With Answers & Detailed Explanations (NCERT Based)
Class: 9 |
Subject: Computer Science |
Section: Computer Security & Data Protection |
Topic: Types of Computer Threats |
Board: CBSE Board Examination
Q1. A computer threat is:
Answer: B
A computer threat is any possible danger that can harm data, hardware, or software.
A computer threat is any possible danger that can harm data, hardware, or software.
Q2. Virus is a:
Answer: B
A virus is malicious software that spreads and damages files.
A virus is malicious software that spreads and damages files.
Q3. Worms spread through:
Answer: B
Worms replicate themselves and spread via computer networks.
Worms replicate themselves and spread via computer networks.
Q4. Trojan horse is:
Answer: B
Trojan disguises as legitimate software but performs harmful actions.
Trojan disguises as legitimate software but performs harmful actions.
Q5. Spyware is used to:
Answer: B
Spyware collects personal information without user knowledge.
Spyware collects personal information without user knowledge.
Q6. Ransomware does what?
Answer: B
Ransomware locks files and asks ransom money to unlock them.
Ransomware locks files and asks ransom money to unlock them.
Q7. Phishing attacks occur via:
Answer: A
Phishing tricks users into revealing passwords or bank details.
Phishing tricks users into revealing passwords or bank details.
Q8. Keylogger records:
Answer: B
Keyloggers capture typed passwords and messages.
Keyloggers capture typed passwords and messages.
Q9. Adware displays:
Answer: B
Adware shows unwanted ads and may track browsing habits.
Adware shows unwanted ads and may track browsing habits.
Q10. DoS attack aims to:
Answer: B
Denial of Service floods systems, making them unavailable.
Denial of Service floods systems, making them unavailable.
Q11. Malware enters via:
Answer: B
Malware spreads through infected downloads, USBs, or emails.
Malware spreads through infected downloads, USBs, or emails.
Q12. Rootkits hide:
Answer: A
Rootkits hide malicious activity from detection.
Rootkits hide malicious activity from detection.
Q13. Botnet is:
Answer: B
Botnets are controlled remotely to perform attacks.
Botnets are controlled remotely to perform attacks.
Q14. Social engineering targets:
Answer: B
It manipulates people into revealing confidential data.
It manipulates people into revealing confidential data.
Q15. Spam emails are:
Answer: B
Spam emails may carry phishing links or malware.
Spam emails may carry phishing links or malware.
Q16. Data theft means:
Answer: A
Unauthorized copying of sensitive data is data theft.
Unauthorized copying of sensitive data is data theft.
Q17. Password cracking is:
Answer: B
Hackers use tools to guess or decode passwords.
Hackers use tools to guess or decode passwords.
Q18. Shoulder surfing involves:
Answer: A
It is spying on someone entering passwords.
It is spying on someone entering passwords.
Q19. Zero‑day threat exploits:
Answer: B
It attacks before developers release a fix.
It attacks before developers release a fix.
Q20. Biggest cause of threats is:
Answer: A
Unsafe browsing, weak passwords, and ignorance cause threats.
Unsafe browsing, weak passwords, and ignorance cause threats.
