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Sit 105: Introduction To Computer Hardware Question Paper

Sit 105: Introduction To Computer Hardware

Course:Information And Communication Technology

Institution: Kenyatta University question papers

Exam Year:2010

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2009/2010

INSTITUTE OF OPEN LEARNING
EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE
(INFORMATION TECHNOLOGY)
SIT 105:
INTRODUCTION TO COMPUTER HARDWARE
=================================================================
DATE: FRIDAY 23RD JULY 2010

TIME: 11.00 A.M. - 1.00 P.M.

INSTRUCTIONS
Answer Question 1 and any other TWO Questions.

Question 1.

a)
Define the following terms:

i)
digital design

ii)
algorithmic state machine
iii)
instruction set architecture
iv)
control signals
v)
storage devices

(5 marks)

b)
The PC is a system composed of well-defined components. Identify any five

components and explain the purpose of each.

(5 marks)

c)
The following list presents categories used for classifying networks. For each

category, identify and describe two typical examples (types).

i)
Wireless technologies

ii)
Wired technologies

iii)
Network topologies

(6 marks)

Page 1 of 5

d)
What operations are performed by the following Instruction Mnemonics:

i)
ADD

ii)
AND
iii)
NOT
iv)
LDM
v)
JMP
vi)
JPC

(6 marks)

e)
A block diagram of the microprocessor control system circuit used is shown below.

Explain the purpose of the following devices in such a system:

i)
Processor Unit

ii)
Interface circuit
iii)
Display
iv)
Keyboard
v)
50Hz counter
vi)
Timers
vii)
D-A Converter
viii) Mains power supply

(8 marks)

Page 2 of 5

Question 2.

a)
List and state the purpose of the steps that the Algorithmic State Machine (ASM)

method is composed of.

(5 marks)
b)
An ASM chart consists of an interconnection of three types of basic elements.

Describe them.

(6 marks)
c)
Give a detailed account of what you understand by the following terms:
Page 3 of 5

i)
A Memory Buffer Register

ii)
Memory address register

(4 marks)

Question 3
a)
Define an instruction Set and giving examples explain what each of the following

categories serve:
i)
Arithmetic instructions
ii)
Logic instructions
iii)
Data instructions

(7 marks)

b)
i)
Briefly explain the Basic Instruction Design Goals.
(2 marks)

ii)
Discuss the importance of the Design of the Instruction Set with respect to:
? Cost
? Expandability
? Data instructions

(6 marks)

Question 4
a)
Explain what you understand by the following:

i)
Virtual private network

ii)
Internetwork
iv)
Internet
v)
Intranets
vi)
Extranets

(5 marks)

b)
State and explain four purposes of a computer network.

(5 marks)
c)
Identify the use of five basic hardware component in a computer network. (5 marks)

Page 4 of 5
Question 5
a)
Clearly state the use of the following:

i)
output devices

ii)
processing devices

iii)
storage devices

(3 marks)

b)
Describe how any two types of these devices are used.

(12 marks)

Page 5 of 5

Sit 105: Introduction To Computer Hardware Question Paper

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