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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

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