ITPEC IP April 2023 Question 38

A and B are appropriate virus countermeasures: install antivirus software and apply security patches. Antivirus can detect, block, quarantine, and remove known or suspicious malware. Patches close vulnerabilities that malware may exploit. Both must be kept current and combined with safe handling of files and links.

Answer (a)

Why not others:
- C prevents some unauthorized use of a drive but does not detect or stop virus code from infecting an authorized running system
- D protects file confidentiality but an authorized process, including malware running under that user, may still access or damage decrypted files
- (b), (c), and (d) include C or D or omit one of A and B

Key rule: Malware prevention relies on detection and removal plus eliminating exploitable weaknesses; access passwords and encryption serve different primary goals.

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