Cyber Security MCQs

Computer

Cyber Security MCQs

Practice Cyber Security MCQs covering viruses, malware, phishing, hacking, firewall, antivirus and cybersecurity concepts with answers and explanations.

269
Total Questions

Practice Questions

Page 7 of 14
Question #121
Which specific sub-type of social engineering attack targets high-profile corporate decision-makers like CFOs or CEOs to steal sensitive institutional records?
A. Smishing Campaign
B. Spam Blasting
C. Vishing Routine
D. Whaling Attack
Discuss
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Correct Answer: Option D

Explanation:
Whaling is a highly specialized phishing variant designed to target C-suite executives and high-value corporate decision makers.
This question belongs to: Computer Cyber Security
Question #122
Which software asset isolates confirmed or highly suspected malware components in a protected, un-executable folder directory to protect host application security?
A. Quarantine
B. Firewall Rule Sheet
C. Sandbox Space
D. Heuristic Analyzer
Discuss
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Correct Answer: Option A

Explanation:
Antivirus quarantine utilities isolate suspected malware files in a secure directory structure, keeping them from interacting with the main OS.
This question belongs to: Computer Cyber Security
Question #123
What type of communication attack uses a specialized network sniffer tool to map and record unencrypted data frames moving across a local network interface?
A. Eavesdropping / Packet Sniffing Attack
B. Denial of Service Attack
C. Buffer Overflow Exploit
D. Brute Force Cryptanalysis
Discuss
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Correct Answer: Option A

Explanation:
Packet sniffing or eavesdropping intercepts raw data frames over network links, allowing threat actors to spy on unencrypted confidential payloads.
This question belongs to: Computer Cyber Security
Question #124
A type of malicious code string configured to remain hidden and completely dormant inside a database system until a precise system clock threshold triggers its execution is a/an:
A. Macro Virus
B. Rootkit Module
C. Logic Bomb
D. Computer Worm
Discuss
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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 #125
Which protocol establishes a secure, encrypted data corridor across public networks, shielding a client device's data traffic from local network interception?
A. Virtual Private Network (VPN)
B. Intrusion Detection Module
C. Proxy Gateway Server
D. Firewall Layer
Discuss
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Correct Answer: Option A

Explanation:
VPNs establish encrypted tunnels over public networks, shielding active data data traffic from interception or monitoring.
This question belongs to: Computer Cyber Security
Question #126
What form of software vulnerability allows threat actors to execute arbitrary client-side scripts inside other users' browsers by compromising vulnerable web outputs?
A. Cross-Site Scripting (XSS)
B. Buffer Overflow
C. SQL Injection
D. Zero-Day Exploit
Discuss
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Correct Answer: Option A

Explanation:
XSS allows threat actors to execute malicious client-side scripts inside other users' browser views by compromising vulnerable web outputs.
This question belongs to: Computer Cyber Security
Question #127
Which defensive security tool intercepts client network calls, masking internal infrastructure topologies while filtering outbound requests for web safety configurations?
A. Proxy Server / Reverse Proxy
B. Virtual Private Network
C. Stateful Packet Matrix
D. Intrusion Detection Loop
Discuss
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Correct Answer: Option A

Explanation:
Proxy servers intercept and forward requests between networks, masking internal infrastructure topologies and filtering incoming web traffic.
This question belongs to: Computer Cyber Security
Question #128
Which type of network security exploit uses a fake wireless router with the exact same SSID label as a corporate office network to trick workers into connecting so the attacker can log their data traffic?
A. Evil Twin Attack
B. DDoS Flood
C. SQL Injection Squeeze
D. Brute Force Cracking
Discuss
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Correct Answer: Option A

Explanation:
An Evil Twin attack clones a legitimate Wi-Fi access point configuration to trick users into connecting, allowing the attacker to monitor network traffic.
This question belongs to: Computer Cyber Security
Question #129
Which malicious software hides inside a seemingly legitimate utility or software application, only to execute its malicious payload once installed by an unsuspecting user?
A. Spyware
B. Ransomware
C. Trojan Horse
D. Computer Worm
Discuss
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Correct Answer: Option C

Explanation:
A Trojan Horse masquerades as safe, benign software to trick users into running it, but contains hidden malicious code designed to compromise system security.
This question belongs to: Computer Cyber Security
Question #130
What is the primary purpose of a firewall in a computer network?
A. To encrypt all data on the network
B. To provide backup services
C. To monitor and control incoming and outgoing network traffic
D. To detect and remove viruses
Discuss
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Correct Answer: Option C

Explanation:
A firewall monitors and controls incoming and outgoing network traffic based on predetermined security rules.
This question belongs to: Computer Cyber Security
Question #131
Which of the following is a type of malware that disguises itself as legitimate software to trick users?
A. Virus
B. Ransomware
C. Worm
D. Trojan Horse
Discuss
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Correct Answer: Option D

Explanation:
A Trojan Horse is a type of malware that masquerades as a legitimate program to deceive users into installing it.
This question belongs to: Computer Cyber Security
Question #132
What is 'phishing' in the context of cybersecurity?
A. A physical attack on hardware
B. A type of virus that replicates itself
C. A network scanning technique
D. A fraudulent attempt to obtain sensitive information by disguising as a trustworthy entity
Discuss
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Correct Answer: Option D

Explanation:
Phishing is a cyber attack where attackers send fake communications, pretending to be from trusted sources, to trick individuals into revealing confidential information.
This question belongs to: Computer Cyber Security
Question #133
Which of the following is NOT considered malware?
A. Trojan
B. Ransomware
C. Firewall
D. Virus
Discuss
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Correct Answer: Option C

Explanation:
A firewall is a security device or software, not malware. Viruses, Trojans, and ransomware are all types of malicious software.
This question belongs to: Computer Cyber Security
Question #134
What does the 'C' in the CIA triad of cybersecurity stand for?
A. Control
B. Certification
C. Confidentiality
D. Compliance
Discuss
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Correct Answer: Option C

Explanation:
The CIA triad stands for Confidentiality, Integrity, and Availability, which are the three core principles of information security.
This question belongs to: Computer Cyber Security
Question #135
Which type of malware encrypts a victim's files and demands a ransom for the decryption key?
A. Worm
B. Virus
C. Ransomware
D. Spyware
Discuss
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Correct Answer: Option C

Explanation:
Ransomware is a type of malware that denies access to a user's data by encrypting it and then demands a ransom for the decryption key.
This question belongs to: Computer Cyber Security
Question #136
What is the function of antivirus software?
A. To detect, prevent, and remove malware
B. To encrypt data
C. To manage network traffic
D. To provide internet connectivity
Discuss
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Correct Answer: Option A

Explanation:
Antivirus software is designed to detect, prevent, and remove malicious software from a computer system.
This question belongs to: Computer Cyber Security
Question #137
Which of the following is a common technique used in phishing attacks?
A. Sending fraudulent emails that appear to come from legitimate sources
B. Denial-of-service attack
C. Physically stealing hardware
D. Installing a virus on a computer
Discuss
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Correct Answer: Option A

Explanation:
Phishing attacks often involve sending deceptive emails that look like they are from reputable companies to trick recipients into providing sensitive information.
This question belongs to: Computer Cyber Security
Question #138
What is a 'worm' in the context of malware?
A. A program that disguises itself as a legitimate file
B. A type of ransomware
C. A form of spyware
D. A self-replicating program that spreads without user intervention
Discuss
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Correct Answer: Option D

Explanation:
A worm is a standalone malware that replicates itself and spreads to other computers without requiring any user action.
This question belongs to: Computer Cyber Security
Question #139
Which of the following is a common security practice to protect against unauthorized access?
A. Sharing passwords with colleagues
B. Disabling all firewalls
C. Using the same password for all accounts
D. Using strong and unique passwords
Discuss
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Correct Answer: Option D

Explanation:
Using strong, unique passwords is a fundamental security measure to prevent unauthorized access to accounts and systems.
This question belongs to: Computer Cyber Security
Question #140
What is a 'man-in-the-middle' (MITM) attack?
A. An attack that physically destroys hardware
B. An attack that targets a single user with a phishing email
C. An attack that uses a virus to replicate
D. An attack where the attacker intercepts communication between two parties
Discuss
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Correct Answer: Option D

Explanation:
A man-in-the-middle attack occurs when an 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

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