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Kansbag Comp Studies Ppr 1 Question Paper

Kansbag Comp Studies Ppr 1

Course:Secondary Level

Exam Year:2009

Name Admission Number /

451/1
COMPUTER STUDIES
Paper 1
2½ hours

KANSBAG PROJECTIONS FORM FOUR ENTRY TERM 1 EXAMINATION 2009
Kenya Certificate of Secondary Education
COMPUTER STUDIES
Paper 1
2½ hours

Instructions to Candidates
Answer all question s in section A.
In section B answer question 16 and any other three questions in the spaces provided.

For Examiner’s Use Only
Section Questions Candidate’s Score
A 1 – 11
B
Total Score

SECTION A (40 MARKS)
1. i) What is meant by
a) Analog data (1 mk)

b) Digital data (1 mk)

2. State whether the following are softcopy or output devices
i) Computer output on microform (COM) (1 mk)

ii) Light emitting diodes (LED)

3. Give one reason why smoking is not allowed in the computer laboratory (2mks)
4. Name and explain the functions of the following keyboard keys represented by the following symbols (3mks)
i)

ii)

5. What is a plotter? State two areas where it is used
(2mks)

6. Give four reasons why microcomputers are used in Kenya as compared to minicomputers (4mks)
7. State three types of registers
(3mks)
8. a) What is an information system? State 3 most common system development theories. (4mks)
b) State three system changeover strategies (3mks)

iii)

15. List down four types of computer viruses
(2mks)
9. State 3 factors you should consider when choosing an operating system (3mks)
10. Distinguish between Save and Save A~; features of MS-Word (2mks)
11. State three advantages of using the traditional method of managing data compared to using modem
databases (3mks)
12. Explain what is meant by a master page in desktop publishing?
(2mks)
13. List four E-mail services
(2mks)
14. State 2 importance of proofreading a document
(2mks)

SECTION B (60 MARKS):
Question 16 is compulsory. Answer any other 3 questions
16. A rectangle is transformed by enlargement of scale factor -2. if the area of its image is 48cm2 , write
a pseudo code to find the area of the rectangle (7marks)
b) State three types of control structures used in programming.
(3mks)
c) List the three target groups for any type of program documentation.
(3mks)
d) Define the following terms used in programming (2mks)

b) What is a bug?
(lmk)
i) Syntax errors
ii), Dry -run
17. There are 7 stages in the program development cycle. Describe each on of them in order, and state
what happens in each (l4mks)
18. a) Define the following terms used in programming
(6mks)

c) Distinguish between machine language and Assembly language
(2mks)
i) Source program
ii) Object code
iii) Translators
b) What is the difference between a compiler and an interpreter?
(2mks)
d) State 3 disadvantages and 2 advantages of low-level languages
(5 mks)
19. a) Define the following terms
(4 mks)

i) Amplitude
ii) Frequency
iii) Pits
iv) Nibble'
b) State three data representation codes used in computers
c) Arrange the following data units in ascending order of size BYTE, FILE, BIT, NIBBLE
d) Perform the following binary arithmetic giving the answers in decimal notation
i) 1110.0111 + 1101001.011
ii) 1001011.011 - 111.111
(3mks)
(2mks)
(3mks)
(3mks)

20. a) State any 3 elements of a computer file
(3mks)
b) Distinguish between physical file: and logical files
(2mks)
c) Describe each of the following data methods
(6mks)
i) Batch processing
ii) Distributed processing

iii) Multiprogramming
d) i) Differentiate between direct and serial file access methods of a file organization
ii) State one direct access storage media and one serial access storage media.
(2mks)

Kansbag Comp Studies Ppr 1 Question Paper

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