Exercise 5 - pspm11/12

    1.      a)  List three (3) types of mobile communication devices.          (3m)

b)  Explain how IT can benefit education.                                        (3m)

    2.    The numbering system is a way of representing data.

a)       Show the conversion of the binary number 1011011 to decimal number.                      (4m)

b)       Show the conversion of the hexadecimal number 4F6A to decimal number.                 (4m)

c)       Show the conversion of the hexadecimal number F3A2 to binary number.                    (4m)

    3.       a)   What is the Boolean expression of F as shown in figure below ?                                         (4m)

b)  Draw the logic circuit for the Boolean expression (BC + A)(Anot + C) = Y                           (6m)

c)  How many bits would it take to represent the following phrase using the ASCII code ?

                                Introduction to Computer Science                                                                  (3m)

d)    One of the units of measuring memory size is kilobyte (KB) which is equal to 1024 bytes.

i)                     State one gigabyte (GB) in megabytes (MB)                                                              (1m)

ii)                   State one gigabyte (GB) in bytes                                                                                 (1m)

    4.      a)  State two (2) differences between RAM and ROM                                                                  (4m)

b)  List three (3) secondary storage                                                                                                 (3m)

c)  Central Processing Units (CPUs) contain two parts. Describe the two (2) parts. (4m)

                d)  Give three (3) utility programs and state their functions.                                                       (6m)

     5.      a)  A computer network is a collection of computers and devices connected together via communication devices and transmission media.

i)                     Name three (3) communication network devices.                        (3m)

ii)                   What is the difference between a Local Area Network (LAN) and Metropolitan Area Network (MAN) ?                                                                                          (2m)

iii)                  Name the largest public Wide Area Network (WAN)                    (1m)

b)            i)              “ All of the computers and devices (nodes) on the network connect to a central device. All data that transfer from one node to another passes through the hub or switch.” What is the network topology described by this statement ?                                                      (2m)

                ii)             Draw the ring network topology.                                      (2m)

iii)                  List two (2) advantages of the bus network topology.   (4m)

     6.     Puan Laila plans to subscribe Internet services at home and requests your opinion on the following matters :

a)       What is the importance of Internet access ?                                                          (2m)

b)       Give three (3) Internet service providers in Malaysia.                                         (3m)

c)       Give two (2) differences between dial-up and broadband services.                                 (4m)

d)       What is IP address and its relationship to domain name ?                                   (4m)

     7.    a)  Define the following terms :

i)         web page                               (2m)

ii)       web server                            (2m)

b)  Shown below is a unique address of a Web page :

                                http://www.mns.my/section.php

i)                     Which country is this domain name registered ?                                                  (1m)

ii)                   Which part of the Web page address above is known as protocol ?                 (1m)

iii)                  Which part of the Web page address above is known as domain name ?        (1m)

iv)                  Which part of the Web page address above is known as Web page name ?   (1m)

c)  One way of navigating Web pages is by using hyperlinks.

                i)   Define hyperlinks                           (2m)

                               

     8.    a)  Phishing is an email fraud scam use for identify theft.

i)         Define identity theft                                                            (3m)

ii)       Explain two (2m) steps to protect your identity.            (4m)

b)  Based on the given situation, identify the type of computer crime.

                i)  En Faisal makes a copy of a copyright image of a company from the company’s Web site without permission and displays the image in his company’s Web site.               ……………………..      (2m)

                ii)  Siti downloaded Harry Potter movie from the Internet and then made DVD copies to sell them to her friends.                ……………………………………….                                                                                  (2m)

END OF QUESTION PAPER