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Computer Security — Computer Questions & Practice

Practise 26 Computer Security questions from Computer for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong.

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Practice questions on Computer Security — with answers

Try each question first, then open the answer. Explanations are included.

1. Which of the following best defines the security term 'Virus'?

ASoftware or hardware that records keystrokes made by a user, often used to steal passwords/sensitive data
BA malicious program that attaches itself to a legitimate file/program and replicates when the infected program is executed
CSoftware that automatically displays or downloads unwanted advertisements
DA standalone malicious program that self-replicates and spreads across networks without needing to attach to a host program

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Answer: B

'Virus': A malicious program that attaches itself to a legitimate file/program and replicates when the infected program is executed.

2. Which of the following best defines the security term 'Worm'?

AMalware disguised as legitimate software, which performs malicious actions once installed, without self-replicating
BA standalone malicious program that self-replicates and spreads across networks without needing to attach to a host program
CA fraudulent attempt to obtain sensitive information by disguising as a trustworthy entity in electronic communication
DA malicious program that attaches itself to a legitimate file/program and replicates when the infected program is executed

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Answer: B

'Worm': A standalone malicious program that self-replicates and spreads across networks without needing to attach to a host program.

3. Which of the following best defines the security term 'Spyware'?

AA standalone malicious program that self-replicates and spreads across networks without needing to attach to a host program
BA malicious program that attaches itself to a legitimate file/program and replicates when the infected program is executed
CMalware that encrypts a victim's files and demands payment (ransom) for the decryption key
DSoftware that secretly monitors and collects user information without their knowledge or consent

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Answer: D

'Spyware': Software that secretly monitors and collects user information without their knowledge or consent.

4. Which of the following best defines the security term 'Adware'?

AThe act of disguising a communication from an unknown source as being from a known, trusted source
BSoftware that secretly monitors and collects user information without their knowledge or consent
CSoftware that automatically displays or downloads unwanted advertisements
DSoftware or hardware that records keystrokes made by a user, often used to steal passwords/sensitive data

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Answer: C

'Adware': Software that automatically displays or downloads unwanted advertisements.

5. Which of the following best defines the security term 'Ransomware'?

ASoftware or hardware that records keystrokes made by a user, often used to steal passwords/sensitive data
BSoftware that secretly monitors and collects user information without their knowledge or consent
CMalware that encrypts a victim's files and demands payment (ransom) for the decryption key
DSoftware that automatically displays or downloads unwanted advertisements

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Answer: C

'Ransomware': Malware that encrypts a victim's files and demands payment (ransom) for the decryption key.

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Computer Security — Computer Questions & Practice

Practice questions on Computer Security — with answers

1. Which of the following best defines the security term 'Virus'?

2. Which of the following best defines the security term 'Worm'?

3. Which of the following best defines the security term 'Spyware'?

4. Which of the following best defines the security term 'Adware'?

5. Which of the following best defines the security term 'Ransomware'?

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