OPPapers.com

Jjjj

X206/301
NATIONAL QUALIFICATIONS 2009 THURSDAY, 4 JUNE 9.00 AM – 11.30 AM

COMPUTING
HIGHER

Attempt all questions in Section I. Attempt all questions in Section II. Attempt one sub-section of Section III. Part A Part B Part C Artificial Intelligence Computer Networking Multimedia Technology Page 11 Page 15 Page 19 Questions 24 to 28 Questions 29 to 32 Questions 33 to 36

For the sub-section chosen, attempt all questions. Read all questions carefully. Do not write on the question paper. Write as neatly as possible.

SA X206/301 6/8120

*X206/301*

©

SECTION I Attempt all questions in this section. 1. (a) Write the binary number 1000100111 as a positive integer. (b) Represent the decimal number –73 using 8 bit two’s complement.

Marks

1 1

2.

Most modern computers use Unicode rather than ASCII to represent text. State one advantage of Unicode when compared to ASCII. 1

3.

State the number of bits required to represent 16 777 216 colours.

1

4.

System software consists of the operating system and utility programs. (a) A disk editor is a common example of utility software. one function of a disk editor. Describe 1 1

(b) The bootstrap loader is part of the operating system. State the purpose of the bootstrap loader.

5.

A trojan horse is a malicious computer program. State one characteristic of a trojan horse.

1

6.

Explain why increasing the number of registers could improve system performance.

1

7.

A piece of software has been installed on a computer. A compatibility issue may prevent the new software from running properly on the computer. (a) State one possible software compatibility issue that might prevent the new software from running. (b) State one possible hardware compatibility issue that might prevent the new software from running. 1 1

8.

A company is advised to change from a peer-to-peer network to a client-server network. (a) Describe one difference between a peer-to-peer network and a...