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Sci 104 Foundations Of Computer Science Question Paper

Sci 104 Foundations Of Computer Science

Course:Bachelor Of Science In Industrial Chemistry

Institution: University Of Nairobi question papers

Exam Year:2016

UNIVERSITY OF NAIROBI
UNIVERSITY EXAMINATIONS 2016/2017
FIRST YEAR EXAMINATIONS FOR THE DEGREE OF BACHELOR OF
SCIENCE IN CHEMISTRY,BACHELOR OF SCIENCE IN INDUSTRIAL
CHEMISTRY
SCI 104 : FOUNDATIONS OF COMPUTER SCIENCE 1
DATE: DECEMBER 15 ,2016 TIME: 9.00A.M -11.00A.M.
ANSWER ALL QUESTIONS
1 i)Describe the function of the following in a computer system.Give
examples where applicable:
a) CPU (2 marks)
b) Memory (2 marks)
c) Input devices (3 marks)
d) Output devices (3 marks)
ii) Select three types of secondary storage devices and compare them
listing one advantage and one disadvantage (6 marks)

2 i)What do the following terms mean in the computing context
a)Bit (1 mark)
b)BYTE (1 mark)
c) TROJAN (1 mark)
d)URL (1 mark)
c)TCP/IP (1MARKS)

ii)Write brief notes differentiating the following
a)multi –user single user (4 marks)
b)Dedicated and General operating sysems (4marks)
c)Cooperative and pre-emptive switching (4 marks)

3 Name and describe the purpose/nature of A,B and C in fig 1 below (10 marks)

tel. line

C C

4 i) Convert the following from Decimal to the base indicated (1 mark)
a)36 to octal
b)87 to hexadecimal (1 mark)

ii)Convert the following from binary to indicated base
a)101110 to decimal (1 mark)
b) 110111 to octal (1 mark)

iii) Do the following calculations
a) 1010 + 101101 (2 marks)
b) 1110011 -10110111 (2 marks)
c) -11101101 -10101011 (3 marks)

iv)You are in charge of the security of the the computer lab in your
organization.Outline the steps you would take to ensure that both the
equipment and information is safe and secure. (10 marks)

v)This year’s national election wil rely heavily on electronic systems,voter
registration to transmission and tallying of votes.Briefly discuss ways in which
the system could be compromised. (5 marks)

Sci 104 Foundations Of Computer Science Question Paper

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