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Computer Studies Paper 1(Theory) Question Paper

Computer Studies Paper 1(Theory)

Course:Secondary Level

Exam Year:2010

NAME…………………………………………………….INDEXNO………………………………..
SCHOOL…………………………………………SIGNATURE…………………..DATE…….......
COMPUTER STUDIES
451/1
PAPER 1(Theory)
JULY/AUGUST2010
TIME: 2½HRS
BOMET / CHEPALUNGU DISTRICTS JOINT
EXAMINATION. M-CATS
Kenya certificate of secondary education 2010
INSTRUCTION TO CANDIDATE
_ This paper consist of TWO sections A and B
_ Answer all questions in section A
_ Answer question 16 and other THREE questions from section B
_ All answers should be written in the spaces provided on the question paper
FOR OFFICIAL USE ONLY

1.a) Define the term ‘operating system’ (1mk)
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b) State three classifications of operating system in terms of their interfacing. (3mks)
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2. a) Define the term computer laboratory (2mks)
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b) Explain two factors to be considered when preparing a computer laboratory.
(4mks)
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3. Briefly explain the following terms as used in disk management
(i) Fragmentation (1mk)
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(ii) Compression (1mk)
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(iii) Disk partitioning (1mk)
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4. What are turn around documents? (2mks)
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b) Name any two data capture techniques that make use of turnaround document.
(2mks)
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5.a) Define the term ‘algorithm.’ (1mk)
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b) Write an algorithm to compute the area of a triangle (2mks)
6.a) Describe three functions performed by the CPU (3mks)
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7. Differentiate between Batch processing and real time processing modes. (2mks)
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8.a) What is document formatting? (2mks)

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b) Give any five document formatting features of a word processor (5mks)
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9. What is electronic spread sheet software. (2mks)
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b) A worksheet contains the data shown below
Cell A1 A2 A3 C1 C2 C3 G1
Entry 5 7 10 10 15 15 =sum
if(A1:C3,”<=10”)
State the value displayed in G1 (2mks)
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10.a) Define the term normalization as used in data base design (2mks)
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b) State three objectives of normalization. (3mks)
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11. What is text wrap. (2mks)
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b) Explain three ways you can wrap-text an object. (6mks)

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12. Name the two most common protocols for the internet (2mks)
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13. Explain the following:
(i) Data security (2mks)
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(ii) Data integrity (2mks)
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14. Distinguish between logical and physical computer file (4mks)
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15. Name two methods of paper orientation as used in DTP (2mks)

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SECTION B : (40MKS)
Answer question 16 and any other THREE questions from this section on the spaces
provided
16. MOLYN sawing society (MSS) pays 10% interest on shares exceeding ksh100, 000
and 6% on shares that do not meet this target. However no interest is paid on
deposits in the members MSS bank account.
a) Design a pseudocode program that would:
(i) Prompt the user for shares and deposits of a particular member
(ii) Calculate the interest on total savings7
(iii) Display the interest and total savings on the screen for a particular member of
the society (7mks)
b) Draw a flow chart for the above pseudocode (8mks)
17. A manager wishes to replace the current manual system with a computerized one
a) Describe three main areas that must be evaluated to justify the replacement.
(6mks)
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b) List the three areas that would be considered in the requirement specifications
(3mks)
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c) Explain three ways that can be followed to replace the system. (6mks)
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18.a) Subtract 01112 from 10012 (1mk)
b) Using two’s complement subtracts 7 from 2 and give the answer in decimal notation.
(4mks)
c) Convert: (i) 91B16 to octal (3mks)

(ii) 3768 to hexadecimal (3mks)
(iii) 9.62510 to binary (4mks)
19.a) Outline the features applications, advantages and disadvantages of the on-line
data processing mode. (8mks)
b) Explain the use of the following file in an organization
(i) Master file (2mks)
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(ii) Transaction file . (2mks)
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(iii) Back-up file (2mks)
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(iv) Report file (1mk)
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20.a) With the aid of a diagram briefly describe any three types of network topologies.
(9mks)

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b) Describe the following terms as used in programming
(i) Interpreter (2mks)
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(ii) Compiler (2mks)
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(iii) Source code (2mks)
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Computer Studies Paper 1(Theory) Question Paper

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