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Computer Studies Paper 1 Question Paper

Computer Studies Paper 1

Course:Secondary Level

Exam Year:2009

Name………………………………………………………. Index No…………………/…….
School……………………………………………………… Candidates Signature………………
Date ………………………………..
451/1
COMPUTER STUDIES
Paper 1
July/August 2009
2 ½ Hours
NYAMIRA DISTRICT JOINT SECONDARY SCHOOLS
EVALUATION TEST – 2009
Kenya Certificate of Secondary Education (K.C.S.E)
451/1
COMPUTER STUDIES
Paper 1
July/August 2009
2 ½ Hours
INSTRUCTIONS TO CANDIDATES
Write your Name and Index Number in the spaces provided.
This paper consists of TWO sections: A and B
Answer ALL questions in section A
Answer question 16 and any other THREE from section B
All answers should be written in the spaces provided in the question paper
For Examiners use only.
Section
Question
Candidates Score
A 1 – 15
B
16
17
18
19
20
Total Score
This paper consists of 14 Printed pages.
Candidates should check the question paper to ensure that all the
Papers are printed as indicated and no questions are missing
© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
2
SECTION A (40 MARKS)
Answer all the questions in this section.
1. Write a pseudo code for the above flow chart (2 mks)
2. Differentiate between optical and magnetic scanning techniques used for input and give two
examples in each case. (2 mks)
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Count = lower limit
Lower = count + 1 limit
SUM = SUM + N
COUNT
< = 10?
Sum
N
Yes
No
© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
3
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3. Name the three main types of human computer interface. (11/2 mks)
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4. Distinguish between a folder and a subfolder. (1mk)
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5. Draw an illustration of a USB port and explain its function. (2mks)
6. Differentiate between parallel and serial port interface cables. (1mk)
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7. a) Explain the following storage disks
i) Zip disks
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ii) Jaz disks (1mk)
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b) Give four examples of optical disks. (2mks)
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© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
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8. What do you understand by the following terms: (11/2mks)
i) Industrial espionage
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ii) Eaves dropping
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iii) Surveillance
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9. a) Explain the following terms: (l mk)
i) surf/browse
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ii) Hyperlink
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b) Explain two functions performed by the UPS (1mk)
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10. a) List three data processing methods. ( ½ mks)
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b) Define the term internet. (1mk)
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© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
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c) List four services offered by internet. (2mks)
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11. a) State three communication methods without cables. (11/2mk)
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b) Differentiate between fourth generation languages and third generation languages. (1mk)
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12. a) Using twos compliment work out 1510 - 810 (2mks)
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b) Define the following terms:
i) Source program.
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ii) Object code
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iii) Translator (11/2mks)
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© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
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13. Windows operating system provides the use of tool to help in managing storage devices and
media. Distinguish between the following terms: (11/2mks)
i) Disk defragmenter.
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ii) Partitioning a disk
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iii) Compressing.
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14. a) Give two reasons for partitioning a disk. (1mk)
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b) List two main types of desktop publishing software. (1mk)
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c) Name any four database models. (2mks)
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15. a) Differentiate between functions and formulae. (lmk)
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b) Name four basic types of data used in a spreadsheet (2mks)
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© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
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c) Differentiate between: (11/2mks)
i) Cell referencing
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iii) Relative references
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iii) Absolute referencing
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d) What is data integrity? ( ½ mk)
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e) Differentiate between the following errors: (lmk)
i) Transcription errors
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ii) Transposition errors
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f) The following methods are used in data protection. Explain. (2mks)
i) Audit trail
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ii) Data encryption
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© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
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iii) Log files
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iv) Fire walls
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SECTION B (60 MARKS)
Answer question 16 and any other three questions from this section
16. a) Baraka wholesalers has two categories customers for order processing. Category ‘A’
obtains 10% discount on all orders up to ksh 10,000 otherwise the discount is 20% on
the entire order. Category ‘B’ obtains 30% discount on all orders if the debt repayment is
‘good’ otherwise the discount is 15%.Draw a flow chart for the order processing. (10mks)
© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
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b) A form four class sat for an exam in eight subjects. A student must get an average of 50%
in all subjects in order to pass. A report is required that will show the name, marks
obtained by each student per subject, the average mark and whether the student has passed
or failed. Draw a flow chart for this report. (l0mks)
© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
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17. a) Define the term network topology. (lmk)
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_v_a_r_ _c_o…………………………………………………………………………………………….............
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b) Name three advantages of computer networking. (3mks)
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c) Describe any three functions of network operating systems. (6mks)
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d) Explain the following as used in Internet services (6mks)
i) E- mail
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ii) E- commerce
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iii) E- learning
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e) Piracy means making illegal copies of copyrighted software, information or data. Outline
any four ways in which the copyright law can help to reduce piracy (4mks)
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© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
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18. a) Define the term data communication. (1mk)
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b) Explain the following terms as used in data communication. (2mks)
i) Bandwidth
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ii) Attenuation
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c) Explain the following three types of computer networks (6mks)
i) LAN
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ii) MAN
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iii) WAN
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d) i) What are robots. (1mk)
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ii) Outline any four advantages of using robots in industries over human beings.
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(4mks)
© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
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e) Describe the following communication modes giving an example in each case. (6mks)
i) Simplex
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iii) Full duplex
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iii) Duplex
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19. a) Describe the following careers in the computing field. (6mks)
i) Computer Engineers
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ii) Software engineers
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iii) Computer technician
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b) Identify any three duties of an information system manager. (3mks)
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© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
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c) Giving an example, mention three categories of places where you can advance your
computer skills after sitting for your K.C.S.E. (3mks)
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d) Mention any four formatting features used in Ms Word application. (4mks)
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e) Define the term electronic spreadsheet. (1mk)
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f) Explain the following terms as used in Ms Excel spread sheet package. (3mks)
i) Range
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ii) What if analysis
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iii) Automatic recalculation
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20. a) Define the term information system. (1mk)
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© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
14
b) Outline three circumstances under which an organization may want may want to develop
a new information system. (3mks)
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c) List down any six characteristics of a system. (6mks)
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d) Describe the term data processing. (1mk)
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e) Outline three qualities of good information. (3mks)
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f) List three file organization methods in a computer. (1mk)
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g) Briefly describe the following type of computer files. (3mks)
i) Master file
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iii) Transaction file
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© 2009 Nyamira District Joint Examinations Committee Computer 451/1 Turn Over
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iii) Back up file
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END

Computer Studies Paper 1 Question Paper

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