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 9 of 14
Question #161
What is the function of a network intrusion detection system (IDS)?
A. To encrypt all data on the network
B. To monitor network traffic for suspicious activity and alert administrators
C. To prevent all unauthorized access
D. To provide backup services
Discuss
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Correct Answer: Option B

Explanation:
An IDS monitors network traffic for malicious activities or policy violations and generates alerts to notify administrators.
This question belongs to: Computer Cyber Security
Question #162
Which of the following is a common technique used by attackers to gain unauthorized access?
A. Encrypting data
B. Using antivirus software
C. Brute force attack
D. Installing a firewall
Discuss
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Correct Answer: Option C

Explanation:
A brute force attack involves trying all possible combinations of passwords or keys until the correct one is found, gaining unauthorized access.
This question belongs to: Computer Cyber Security
Question #163
What is 'ransomware'?
A. A type of malware that demands payment to restore access to files
B. A type of encryption algorithm
C. A type of firewall
D. A type of antivirus software
Discuss
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Correct Answer: Option A

Explanation:
Ransomware is a type of malware that encrypts the victim's files or locks their system and demands a ransom payment to restore access.
This question belongs to: Computer Cyber Security
Question #164
Which of the following is a best practice for email security?
A. Verifying the sender's email address before clicking on links
B. Opening attachments from unknown senders
C. Replying to all phishing emails
D. Disabling spam filters
Discuss
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Correct Answer: Option A

Explanation:
Verifying the sender's email address and being cautious with links and attachments are important steps to protect against phishing and malware.
This question belongs to: Computer Cyber Security
Question #165
What is the purpose of a security patch?
A. To change the user interface
B. To increase software performance
C. To fix vulnerabilities and bugs in software
D. To add new features to software
Discuss
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Correct Answer: Option C

Explanation:
A security patch is a piece of code designed to fix a vulnerability or bug in a software program, closing security holes that could be exploited by attackers.
This question belongs to: Computer Cyber Security
Question #166
Which of the following is a type of malware that replicates by attaching itself to other programs?
A. Worm
B. Virus
C. Spyware
D. Trojan
Discuss
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Correct Answer: Option B

Explanation:
A virus is a type of malware that attaches itself to a host program or file and replicates when that program is executed, spreading to other files.
This question belongs to: Computer Cyber Security
Question #167
What is 'cyberspace'?
A. A physical location where computers are stored
B. A type of antivirus software
C. The virtual world of interconnected computer networks and digital communication
D. A physical network cable
Discuss
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Correct Answer: Option C

Explanation:
Cyberspace refers to the global domain of digital networks, communications, and information systems, a virtual environment where online interactions occur.
This question belongs to: Computer Cyber Security
Question #168
Which of the following is a method to protect data at rest?
A. Firewall
B. Intrusion detection system
C. Antivirus software
D. Encryption
Discuss
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Correct Answer: Option D

Explanation:
Encryption is the primary method to protect data at rest, ensuring that even if storage media is compromised, the data remains unreadable without the decryption key.
This question belongs to: Computer Cyber Security
Question #169
What is the difference between a firewall and an antivirus?
A. A firewall protects the device; an antivirus protects the network
B. A firewall protects the network; an antivirus protects the individual device
C. They have the same function
D. An antivirus is hardware; a firewall is software
Discuss
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Correct Answer: Option B

Explanation:
A firewall secures a network by controlling traffic, while antivirus software protects individual devices from malware.
This question belongs to: Computer Cyber Security
Question #170
Which of the following is a form of cyber attack that involves stealing sensitive data from a system?
A. Denial-of-service
B. Data breach
C. Man-in-the-middle
D. Phishing
Discuss
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Correct Answer: Option B

Explanation:
A data breach is a security incident where sensitive, protected, or confidential data is accessed or stolen without authorization.
This question belongs to: Computer Cyber Security
Question #171
What is the principle of 'least privilege' in cybersecurity?
A. Granting users the minimum levels of access necessary to perform their tasks
B. Granting access to all employees
C. Granting access based on seniority
D. Granting all users full access
Discuss
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Correct Answer: Option A

Explanation:
The principle of least privilege means providing users with only the access and permissions they need to perform their job functions, reducing the risk of misuse or unauthorized access.
This question belongs to: Computer Cyber Security
Question #172
Which of the following is a common type of cyber threat targeting financial institutions?
A. All of the above
B. Ransomware
C. SQL injection
D. Phishing
Discuss
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Correct Answer: Option A

Explanation:
Financial institutions are targeted by a variety of cyber threats, including ransomware, phishing, and SQL injection attacks, to steal funds or sensitive data.
This question belongs to: Computer Cyber Security
Question #173
What is the purpose of a security awareness training program?
A. To increase company profits
B. To educate employees about cybersecurity risks and best practices
C. To teach employees how to use software
D. To monitor employee activities
Discuss
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Correct Answer: Option B

Explanation:
Security awareness training educates employees about various cybersecurity threats, such as phishing and social engineering, and teaches them how to respond to protect the organization.
This question belongs to: Computer Cyber Security
Question #174
Which of the following is a characteristic of a secure network?
A. Use of weak passwords
B. Disabled firewalls
C. Regular security updates and patches
D. Open Wi-Fi access
Discuss
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Correct Answer: Option C

Explanation:
Regular security updates and patches are crucial for maintaining a secure network by fixing known vulnerabilities.
This question belongs to: Computer Cyber Security
Question #175
What is 'malware'?
A. Software that manages hardware
B. Software that provides security
C. Software designed to harm or exploit any device, network, or service
D. Software that improves system performance
Discuss
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Correct Answer: Option C

Explanation:
Malware is malicious software designed to damage, disrupt, or gain unauthorized access to a computer system or network.
This question belongs to: Computer Cyber Security
Question #176
Which of the following is a type of attack that attempts to make a service unavailable by overwhelming it with traffic?
A. SQL injection
B. Denial-of-Service (DoS)
C. Man-in-the-middle
D. Phishing
Discuss
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Correct Answer: Option B

Explanation:
A Denial-of-Service (DoS) attack aims to make a service or network resource unavailable by flooding it with traffic or requests.
This question belongs to: Computer Cyber Security
Question #177
What is the function of a security token in multi-factor authentication?
A. To provide a physical key for access
B. To generate a one-time password for authentication
C. To encrypt data
D. To store user passwords
Discuss
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Correct Answer: Option B

Explanation:
A security token, such as a hardware token or a mobile app, generates a one-time password (OTP) that is used as a second factor in authentication, enhancing security.
This question belongs to: Computer Cyber Security
Question #178
Which of the following is a common technique used in social engineering attacks?
A. Installing a virus
B. Using a firewall
C. Pretexting
D. Encrypting data
Discuss
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Correct Answer: Option C

Explanation:
Pretexting is a form of social engineering where an attacker creates a fabricated scenario (pretext) to steal information or gain access to systems.
This question belongs to: Computer Cyber Security
Question #179
What is 'cyber hygiene'?
A. A type of cleaning software
B. A type of antivirus
C. A set of practices to maintain the health and security of a system
D. A physical cleaning of hardware
Discuss
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Correct Answer: Option C

Explanation:
Cyber hygiene refers to a set of practices and steps that users take to maintain system security and protect themselves from cyber threats, such as regular updates and strong passwords.
This question belongs to: Computer Cyber Security
Question #180
Which of the following is a type of malware that hides in the operating system and is difficult to detect?
A. Spyware
B. Ransomware
C. Adware
D. Rootkit
Discuss
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Correct Answer: Option D

Explanation:
A rootkit is a type of malware that hides deep within the operating system, often at the kernel level, making it very difficult to detect and remove.
This question belongs to: Computer Cyber Security

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