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How does an antivirus of today identify viruses?

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+1 vote
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in Operating System by (102k points)
How does an antivirus of today identify viruses?

(a) Previously known patterns

(b) It can detect unknown patterns

(c) It can take high priority to increase scanning speed

(d) None of the mentioned

This question was addressed to me in an internship interview.

My question is based upon Security topic in chapter Security of Operating System

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Best answer
The correct option is (a) Previously known patterns

Best explanation: None.

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