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Unformatted text preview: Use th The processor of a computer is liken to our brain but the computer is not a brain. Explain briefly. [10 marks] What is RAM? Increasing the capacity of RAM can make the computer to work faster. Explain. [10 marks] For each of the statements below, state whether each statement is TRUE/FALSE. For FALSE statements, underline the mistake and write the correct statement. (i) A gigabyte (GB) equals approximately 1 trillion bytes. (ii) Memory cache helps speed the processes of the computer because it stores seldom used instructions and data. (iii) Most computers are analog, which means they recognise only two discreet states : on and off. . (iv) Most RAM retains its contents when the power is removed from the computer. (v) Read—only memory (ROM) refers to memory chips storing temporary data and instructions. [10 marks] 2E4. .531 :32 E The alphabets on the left are represented by :3; 2 numbers in the octal system, that is numbers in 104 D base 8. 13: f, Below is the conversion of digits in the ASCII 7- 1:17 6 bit code I H _ it? . 1—001 112 ii 2 = 010 113 114 L 3 = 01 1 115 g 4 = 100 115 120 r 6 = 110 iii 3 7 = 111 123 S 124 T . 125 U On page 27 Umt 2 of your module, we have ii: 3 W : l 010 111 because W is represented by 127 130 X 1 2 7 i3: ‘2’ Check it out for U and C too. 6 system above to write the following in binary code. (i) E (ii) N (iii) J (iv) 0 (v) Y [10 marks] 10. List 3 input devices and 2 output devices that might be attached to a PC. Describe a typical use for each. [10 marks] List and explain briefly 5 types of application software used in communications? [10 marks] (i) What is memory cache? (ii) How are the two types of cache (L1 cache and L2 cache) different? [10 marks] For each of the false statements below, underline the mistake and write the correct tenn(s) in bracket within the statement. (i) A CD-RW is a type of optical disc on which users can read but not write (record) or erase. (ii) Optical discs are written and read by mirrors. (iii) A buffer is a small program that tells the operating system how to communicate with a specific device. (iv) Two types of system software are operating systems and application programmes. (v) Examples of embedded operating systems include Window Server 2008, UNIX, Linux, Solaris, and Netware. ‘ [10 marks] Many computer users have become addicted to multiplayer online role-playing games. Some of them spend 8 hours or more a day playing these games, even though the interactions are through a keyboard, mouse, and video diSplay. Do you think computer addiction will become a bigger problem when more sophisticated peripherals such as LCD goggle display become commonplace? [10 marks] Use a search engine from Q8 of TMA 1 to find out “What is Green Computing”? Write a short report of your finding. [10 marks] ...
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