MCQs

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1. What is the primary goal of a computer virus?
   a. Theft of personal information
   b. Replicating and spreading to other files
   c. Denial of service attacks
   d. Unauthorized access to a system
   Answer: b. Replicating and spreading to other filesexamradar​
2. Which type of malware disguises itself as legitimate software?
   a. Worm
   b. Trojan
   c. Spyware
   d. Rootkit
   Answer: b. Trojanexamradar​
3. Which malware spreads independently without user action?
   a. Worm
   b. Trojan
   c. Keylogger
   d. Adware
   Answer: a. Wormexamradar​
4. Which malware encrypts files and demands payment?
   a. Spyware
   b. Ransomware
   c. Rootkit
   d. Adware
   Answer: b. Ransomwareexamradar​
5. What is the function of a rootkit?
   a. Encrypt data
   b. Conceal unauthorized access
   c. Display ads
   d. Steal passwords
   Answer: b. Conceal unauthorized accessexamradar​
6. Malware that monitors user activity secretly is called
   a. Trojan
   b. Worm
   c. Spyware
   d. Adware
   Answer: c. Spywareexamradar​
7. The main aim of adware is
   a. Displaying advertisements
   b. Stealing passwords
   c. Encrypting data
   d. Flooding networks
   Answer: a. Displaying advertisementsexamradar​
8. What activates a logic bomb?
   a. A specific condition or event
   b. Network connection
   c. File execution
   d. Email opening
   Answer: a. A specific condition or eventexamradar​
9. What describes a DDoS attack?
   a. Overloading a server with traffic
   b. Encrypting files
   c. Modifying data
   d. Keylogging
   Answer: a. Overloading a server with trafficexamradar​
10. Fileless malware primarily
    a. Operates in system memory
    b. Requires user downloads
    c. Depends on USB drives
    d. Uses email macros
    Answer: a. Operates in system memoryexamradar​
11. Rogue antivirus software pretends to be
    a. Security update
    b. Antivirus program
    c. System driver
    d. Root certificate
    Answer: b. Antivirus programexamradar​
12. Phishing involves
    a. Impersonating a trusted entity
    b. Modifying databases
    c. Encrypting storage
    d. Changing DNS settings
    Answer: a. Impersonating a trusted entityexamradar​
13. A backdoor primarily
    a. Provides unauthorized access
    b. Encrypts communication
    c. Brings advertisements
    d. Deletes files
    Answer: a. Provides unauthorized accessexamradar​
14. Malware that captures keystrokes is a
    a. Keylogger
    b. Spyware
    c. Trojans
    d. Botnet
    Answer: a. Keyloggerexamradar​
15. A polymorphic virus can
    a. Change its code to avoid detection
    b. Infect only documents
    c. Spread through phishing
    d. Require USB media
    Answer: a. Change its code to avoid detectionexamradar​
16. Which malware aims to destroy data?
    a. Logic bomb
    b. Destroyer virus
    c. Worm
    d. Rootkit
    Answer: b. Destroyer virusexamradar​
17. What is a sandbox used for?
    a. Testing malicious code safely
    b. Encrypting data
    c. Scanning networks
    d. Logging traffic
    Answer: a. Testing malicious code safelyexamradar​
18. A man-in-the-middle attack manipulates
    a. Communication between parties
    b. Executable files
    c. DNS lookups
    d. Encrypted databases
    Answer: a. Communication between partiesexamradar​
19. Tunneling helps attackers to
    a. Hide the origin of attacks
    b. Alter encryption keys
    c. Hijack browsers
    d. Disable antivirus
    Answer: a. Hide the origin of attacksexamradar​
20. A spear-phishing attack targets
    a. Specific individuals or organizations
    b. Every random user
    c. Email servers
    d. Network cables
    Answer: a. Specific individuals or organizationsexamradar​
21. The goal of ransomware is
    a. Encrypting files and demanding ransom
    b. Deleting software
    c. Flooding servers
    d. Uploading logs
    Answer: a. Encrypting files and demanding ransomexamradar​
22. Trojans differ from other malware because they
    a. Require user interaction
    b. Spread automatically
    c. Modify firmware
    d. Operate offline only
    Answer: a. Require user interactionexamradar​
23. What defines a botnet?
    a. Many compromised devices controlled remotely
    b. A virus self-replicating offline
    c. Network firewall flaw
    d. Browser hijacking tool
    Answer: a. Many compromised devices controlled remotelyexamradar​
24. A zero-day exploit targets
    a. An unpatched vulnerability
    b. A known signature
    c. Legitimate software
    d. Hardware issues
    Answer: a. An unpatched vulnerabilityexamradar​
25. Privilege escalation aims to
    a. Gain higher system access
    b. Repair software
    c. Encrypt files
    d. Reset system logs
    Answer: a. Gain higher system accessexamradar​
26. Hacking involves
    a. Unauthorized system access
    b. Creating firewalls
    c. Mass mailing
    d. File cleaning
    Answer: a. Unauthorized system accessexamradar​
27. Honeypots are used to
    a. Lure and study attackers
    b. Encrypt sensitive data
    c. Delete logs
    d. Patch vulnerabilities
    Answer: a. Lure and study attackersexamradar​
28. A DDoS attack floods a server with
    a. Excessive traffic
    b. Email viruses
    c. Spoofed ads
    d. Code scripts
    Answer: a. Excessive trafficexamradar​
29. Buffer overflow attacks
    a. Overwrite adjacent memory
    b. Insert fake credentials
    c. Infect USB drives
    d. Alter BIOS configuration
    Answer: a. Overwrite adjacent memoryexamradar​
30. Encryption in cybersecurity means
    a. Converting data into a coded form
    b. Allowing free network sharing
    c. Removing security certificates
    d. Hiding IP addresses
    Answer: a. Converting data into a coded formexamradar​
31. Signature-based detection identifies threats using
    a. Known malware patterns
    b. Randomized algorithms
    c. IP blacklists
    d. File hashes
    Answer: a. Known malware patternsexamradar​
32. Phishing is best described as
    a. Tricking users into revealing data
    b. Encrypting web traffic
    c. Spreading worms
    d. Misrouting packets
    Answer: a. Tricking users into revealing dataexamradar​
33. Social engineering exploits
    a. Human psychology
    b. Encrypted tunnels
    c. Firewall ports
    d. File extensions
    Answer: a. Human psychologyexamradar​
34. Authentication verifies
    a. User identity
    b. Encryption keys
    c. URL security
    d. Network speed
    Answer: a. User identityexamradar​
35. Firewalls function to
    a. Control network traffic
    b. Delete temporary files
    c. Scan local drives
    d. Encrypt databases
    Answer: a. Control network trafficexamradar​
36. Logic bombs activate
    a. Upon preset conditions
    b. Immediately after email open
    c. During boot
    d. Via external storage
    Answer: a. Upon preset conditionsexamradar​
37. Heuristic detection identifies threats by
    a. Analyzing unknown behaviors
    b. Using signature matching
    c. Password hashing
    d. Traffic encryption
    Answer: a. Analyzing unknown behaviorsexamradar​
38. SQL injection involves
    a. Inserting malicious code into databases
    b. Sending spam messages
    c. Encrypting log files
    d. Hijacking browser sessions
    Answer: a. Inserting malicious code into databasesexamradar​
39. Hybrid malware
    a. Combines traits of multiple malware types
    b. Infects web forms
    c. Auto-updates signatures
    d. Needs hardware access
    Answer: a. Combines traits of multiple malware typesexamradar​
40. Network segmentation secures by
    a. Dividing the network into zones
    b. Encrypting payloads
    c. Using identical keys
    d. Combining servers
    Answer: a. Dividing the network into zonesexamradar​
41. Rootkits operate by
    a. Hiding within the operating system
    b. Stopping antivirus updates
    c. Disabling network cards
    d. Cleaning registry
    Answer: a. Hiding within the operating systemexamradar​
42. Intrusion Detection Systems
    a. Monitor and alert suspicious network activity
    b. Encrypt data
    c. Block external DNS
    d. Modify registry
    Answer: a. Monitor and alert suspicious network activityexamradar​
43. SQL Injection is used to
    a. Access and manipulate databases
    b. Encrypt data files
    c. Redirect URLs
    d. Delete traffic logs
    Answer: a. Access and manipulate databasesexamradar​
44. A VPN provides
    a. Secure and private internet connection
    b. Email filtering only
    c. Free network broadcast
    d. Antivirus scanning
    Answer: a. Secure and private internet connectionexamradar​
45. The primary function of a dropper is
    a. Delivering other malware payloads
    b. Encrypting messages
    c. Blocking internet ports
    d. Decoding scripts
    Answer: a. Delivering other malware payloadsexamradar​
46. Polymorphic viruses are difficult to detect because
    a. They change their code structure
    b. They hide in email drafts
    c. They mimic OS files
    d. They need USB media
    Answer: a. They change their code structureexamradar​
47. Spyware typically
    a. Captures login information
    b. Encrypts disks
    c. Floods networks
    d. Deletes databases
    Answer: a. Captures login informationexamradar​
48. Logic bombs trigger based on
    a. Specific dates or actions
    b. Randomized timing
    c. External server commands
    d. File size
    Answer: a. Specific dates or actionsexamradar​
49. Macro viruses spread through
    a. Email attachments
    b. USB keys
    c. Command lines
    d. DNS poisoning
    Answer: a. Email attachmentsexamradar​
50. Fileless malware leaves
    a. No traces on hard drives
    b. Copies on firmware
    c. Encrypted log data
    d. Altered file headers
    Answer: a. No traces on hard drivesexamradar​

1. https://examradar.com/malware-viruses-worms-trojans-mcqs-multiple-choice-questions-with-answers/
2. https://www.sanfoundry.com/1000-cyber-security-questions-answers/
3. https://testbook.com/objective-questions/mcq-on-types-of-malicious-softwares–5eea6a1039140f30f369e884
4. https://www.theknowledgeacademy.com/blog/cyber-security-mcq-and-answers/
5. https://byjus.com/gate/cyber-security-mcqs/
6. https://cyble.com/knowledge-hub/top-15-most-dangerous-malware-threats-in-2025/
7. https://www.crowdstrike.com/en-us/cybersecurity-101/cyberattacks/malicious-code/
8. https://www.interviewbit.com/cyber-security-mcq/
9. https://www.huntress.com/blog/most-common-cyberattacks
10. https://www.aquasec.com/cloud-native-academy/vulnerability-management/malicious-code/
11. https://www.scribd.com/document/808245613/Fundamentals-of-Cyber-Security-MCQ-with-Answers
12. https://www.fortinet.com/resources/cyberglossary/types-of-cyber-attacks
13. https://www.kaspersky.com/resource-center/definitions/malicious-code
14. https://interviewkickstart.com/blogs/articles/cyber-security-mcqs-answers
15. https://www.jit.io/resources/app-security/10-malicious-code-examples-you-need-to-recognize-to-defend-your-sdlc
16. https://www.geeksforgeeks.org/computer-networks/malwares-malicious-software/
17. https://www.sanfoundry.com/cyber-security-questions-answers-virus-worms/
18. https://www.lumificyber.com/blog/5-most-common-types-of-malware-in-2025/
19. https://www.wiz.io/academy/malicious-code
20. https://www.clouddefense.ai/types-of-cyber-attacks/