Computer Security MCQs Class 9
Computer Security MCQs Class 9
With Answers & Detailed Explanations (As Per NCERT Syllabus)
Class: 9 |
Subject: Computer Science |
Section: Computer Security & Data Protection |
Topic: Computer Security |
Board: CBSE Board Examination
Q1. Computer security means:
Answer: B. Protecting computer systems and data from threats
Computer security refers to protecting computers, networks, and data from unauthorized access, damage, or theft.
Computer security refers to protecting computers, networks, and data from unauthorized access, damage, or theft.
Q2. A virus is:
Answer: B
A computer virus is a malicious program that attaches itself to files and spreads, causing harm to data and system performance.
A computer virus is a malicious program that attaches itself to files and spreads, causing harm to data and system performance.
Q3. Malware stands for:
Answer: B. Malicious Software
Malware is any harmful software designed to damage or gain unauthorized access to systems.
Malware is any harmful software designed to damage or gain unauthorized access to systems.
Q4. Software used to detect and remove viruses is:
Answer: B. Antivirus
Antivirus software scans, detects, and removes malicious programs from a computer.
Antivirus software scans, detects, and removes malicious programs from a computer.
Q5. A strong password should contain:
Answer: C
Strong passwords include uppercase, lowercase, numbers, and special characters to enhance security.
Strong passwords include uppercase, lowercase, numbers, and special characters to enhance security.
Q6. Phishing is:
Answer: B
Phishing is a cybercrime where attackers trick users into revealing personal data through fake emails or websites.
Phishing is a cybercrime where attackers trick users into revealing personal data through fake emails or websites.
Q7. Firewall is used to:
Answer: B
A firewall monitors incoming and outgoing traffic and blocks suspicious activities.
A firewall monitors incoming and outgoing traffic and blocks suspicious activities.
Q8. Data backup means:
Answer: B
Backup creates a copy of important data so it can be restored if lost or damaged.
Backup creates a copy of important data so it can be restored if lost or damaged.
Q9. Spyware is designed to:
Answer: B
Spyware secretly monitors user activity and collects personal information.
Spyware secretly monitors user activity and collects personal information.
Q10. Ransomware:
Answer: B
Ransomware locks or encrypts data and demands payment to restore access.
Ransomware locks or encrypts data and demands payment to restore access.
Q11. HTTPS ensures:
Answer: B
HTTPS encrypts data between browser and website, ensuring safe communication.
HTTPS encrypts data between browser and website, ensuring safe communication.
Q12. Two-factor authentication improves:
Answer: B
It adds an extra verification step, making unauthorized access difficult.
It adds an extra verification step, making unauthorized access difficult.
Q13. Cyberbullying occurs through:
Answer: B
Cyberbullying involves harassment or threats using digital platforms.
Cyberbullying involves harassment or threats using digital platforms.
Q14. Updating software helps to:
Answer: B
Updates patch security weaknesses and protect systems from new threats.
Updates patch security weaknesses and protect systems from new threats.
Q15. Trojan horse is:
Answer: B
A Trojan appears legitimate but secretly performs harmful actions.
A Trojan appears legitimate but secretly performs harmful actions.
Q16. Identity theft means:
Answer: B
Identity theft involves using someone’s personal data for fraud.
Identity theft involves using someone’s personal data for fraud.
Q17. Secure websites usually start with:
Answer: B
HTTPS indicates encrypted and secure communication.
HTTPS indicates encrypted and secure communication.
Q18. Antivirus should be:
Answer: B
Regular updates help antivirus detect new threats.
Regular updates help antivirus detect new threats.
Q19. Sharing passwords is:
Answer: B
Sharing passwords increases risk of unauthorized access.
Sharing passwords increases risk of unauthorized access.
Q20. Best practice for data protection is:
Answer: C
Using strong passwords and regular backups ensures maximum data safety.
Using strong passwords and regular backups ensures maximum data safety.
