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E. State whether these statements are true or false.
1. True 2. True 3. False 4. False

Chapter 7

Exercise

A. Answer the following questions:

1. Computer Virus is computer program that do unwanted things with your computer
resources for example, you are working on PC and you are repeatedly receiving annoying
message.
2. A firewall is a system designed to prevent unauthorised access to or from a private
network.
3. Phishing is an attempt to acquire sensitive information such as username, password or
credit card details.

4. Worms are self-replicating viruses and consumes the system resources whereas A
Trojan horse is simply a computer program that claims to be a reliable program, such as
being a game, but instead does damage when you run it (it may erase your hard disk).
5. Back up is needed, if system got damaged by some means, the data can be restored.

B. Fill in the blanks.

1. 17october 2000 2. Cyberbullying 3. Crackers 4. Computer Ethics
5. packet

C. Match the following:

1. d. 2. c. 3. e. 4. b. 5. a.

D. State whether these statements are true or false.
1. False 2. True 3. True 4. False 5. False

88 KVS DELHI REGION 2025