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8.  What is a computer virus? Give an example.

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                 B.  Long answer type questions.
                     1.  Explain any three types of networks.

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                     2.  What are some key reasons for networking computers in today’s world? Mention any two.

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                     3.  What is a network?

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                     4.  Why do we need an antivirus?
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                     5.  Write any three ways to protect your computer from virus.

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