KASNEB
CICT PART I SECTION I
INTRODUCTION TO COMPUTING
FRIDAY:
25TH NOVEMBER 2011
Answer
any five questions
QUESTION
ONE
(a)
Highlight the functions of the six components of a graphical user interface
(6mks)
(b)
The following specifications have been provided for a desktop personal computer
(PC):
- Processor
Quad core
2.33 GHZ
4MB
- 8 USB port
- 4 GB RAM
- 20-in-1 card Reader
- Hard disk 1.1TB
In
relation to the information provided above, one would expect a Quad core
processor to have more processor power.
Required:
(i)
Briefly explain the meaning of the term “processing power”. (3mks)
(ii)
Identify five other factors not given above which could determine the computer’s
processing power (5mks)
(c)
Identify any two major manufacturers of computer processors
(2mks)
(d)
Describe how cache memory is used to accommodate different speeds of the
processor and random access memory
(4mks)
(Total: 20mks)
QUESTION
TWO
(a)
Some computer operating systems support both multiprocessing and time sharing.
Identify
three advantages of:
(i)
Multiprocessing (3mks)
(ii)
Time Sharing (3mks)
(b)
Differentiate between fourth generation languages and graphical user interfaces
(4mks)
(c)
The main objective of installing local area network (LAN) is to share
peripheral devices and data.
With
reference to the above statement:
(i)
Explain two ways in which the main objectives of LAN could be attained (6mks)
(ii)
Outline four possible problems of sharing data on a computer network (4mks)
(Total:
20mks)
QUESTION
THREE
(a)
Convert:
(i)
0.53125 to Octal (2mks)
(ii)
101110.11012
to
decimal (2mks)
(iii)
76.0625 to binary (2mks)
(iv)
437.658
to
Hexadecimal (2mks)
(b)
State four reasons why a commercial organization should always use legally
obtained software(4mks)
(c)
Outline four features of end user license agreement (EULA) (4mks)
(d)
Briefly describe how bar codes are used in retail outlets (4mks)
(Total:
20mks)
QUESTION
FOUR
(a)
Briefly describe three types of computer user interfaces (6mks)
(b)
Outline one basic function of any eight common types of application software
(8mks)
(c)
A customer account file is updated in real-time following the input of a
key-field and a deposit at an automated teller machine (ATM)
Required:
Describe
how the file is updated after the automatic teller machine transaction (6mks)
QUESTION
FIVE
(a)
A computer network is made up two distinct subsets of components.
Briefly
describe the two distinct subsets which comprise a computer network (4mks)
(b)
Explain three types of computer network topologies (6mks)
(c)
Let p be “it is cold” and let q be “it is raining”
Write
a simple sentence which describes each of the following statements:
(i)
~p (1mk)
(ii)
P^q (1mk)
(iii)
p˅q (1mk)
(iv)
q˅~p (1mk)
(v)
~p^~q (1mk)
(vi)
~~q (1mk)
(d)
Find the truth table of ~(p˅q)
QUESTION
SIX
(a)
Distinguish between personal computer and a desktop computer (4mks)
(b)
Highlight six features of e-mail (6mks)
(c)
Describe each of the following information contained in windows installer
software
(i)
Product (3mks)
(ii)
Features (3mks)
(iii)
Components (2mks)
(iv)
Keypaths (2mks)
(Total:
20 mks)
QUESTION
SEVEN
(a)
Briefly discuss the functions of the computer keyboard navigation keys (6mks)
(b)
(i) Explain the concept of file manager in windows (2mks)
(iii)
Analyse the features of the command-based file managers (12mks)
(Total:
20mks)
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