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Sci 112: Introduction To Computer Systems Question Paper

Sci 112: Introduction To Computer Systems

Course:Bachelor Of Procurement And Supply Chain Management

Institution: South Eastern Kenya University question papers

Exam Year:2016

SOUTH EASTERN KENYA UNIVERSITY

UNIVERSITY EXAMINATIONS 2016/2017

SECOND SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN BACHELOR OF PROCUREMENT AND SUPPLY CHAIN MANAGEMENT

SCI 112: INTRODUCTION TO COMPUTER SYSTEMS

DATE: 19TH APRIL, 2017 TIME: 1.30 -3.30 PM

ANSWER QUESTION 1 AND ANY OTHER TWO QUESTIONS

Question 1 (30marks)

a) Explain the following terms as used in computer science:
(i). Data (1mark)
(ii). Program (1mark)
(iii). Data processing (2marks)
(iv). Information (1mark)
b) Give four differences between fifth generation computers and the first generation computers.
(3marks)
c) List and explain three functional elements of a computer system (3 marks)
d) Show the difference between the Control Unit of a processor and the Operating system in
terms of functionality (3marks)

e) A computer specification has the following details:
Pentium III

1.44 MB Floppy disk drive

20 GB Hard disk Full Multimedia

17” SVGA monitor
Pre-installed Operating system
Pre-installed Office Suite

What is meant by (3 marks)
(i). 1.44 MB floppy disk drive.
(ii). 20 GB
(iii). 17” SVGA
f) Distinguish between Copying and Moving text. (2 marks)
g) Explain five application areas where spreadsheet software can be used (5marks)
h) Differentiate between Hacking and Cracking with reference to computer crimes(2marks)
i) Convert 7678 to hexadecimal (2marks)
j) State TWO devices are used to connect your computer to the ISP (2marks)

Question 2 (20marks)
a) A computer must go through the process of booting/initialization before use.
(i). Briefly explain the term “computer booting”(2mark) .
(ii). Explain what happens in the computer during the booting process. (2 marks)
(iii). Give and explain two types of booting. (2 marks)
(iv). What type of memory is used to store the boot up program (the first program to be
executed on switching on a computer). (1 mark)
(v). State two ways of warm booting a computer. (2 marks)

b) Using a well-labelled diagram, give a descriptive illustration of a computer system.(7marks)

c) Name the type of scanner used:

(i). To capture prices of goods at points of sale terminals in supermarkets and superstores(2marks)

Question 3 (20marks)

a) Describe three functions performed by the CPU. (3 marks)

b) Explain the functions performed by each of the following central processing unit elements.

(i). Control Unit. (2 marks)
(ii). Registers. (1 mark)
(iii). The Main memory. (2 marks)

(iv). The System clock. (1 mark)

c) Outline three characteristics of Random Access memory (RAM). (3 marks)

d) You have been asked by a small start-up firm to assist them in selecting a microcomputer for their use. Discuss five hardware and five software factors you would consider in order to select the most suitable computer system. (8marks)

Question 4 (20marks)

a) The following is a simple payroll:

Write formulae using cell names for the following expressions. State where the formula is
placed:
(i) Basic pay = Hours worked x Hourly rate. (2marks)
(ii) Allowances are allocated at 10% of the Basic pay. (2marks)
(iii) Gross pay = Basic pay + Allowances. (2marks)
(iv) Tax deduction is calculated at 20% of the Gross pay. (2marks)
(v) Net pay = Gross pay –Tax deductions. (3marks)

Sci 112: Introduction To Computer Systems Question Paper

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