Computer Studies Form 3, Term 2 Endterm Exams YR2025-100 Marks

Computer Studies Form 3 Term 2 Endterm Exams 2025

Total Marks: 100

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Instructions to Candidates

• Write your NAME and ADM NUMBER in the spaces provided above.
• 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.

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Section A: Answer All Questions [40 Marks]

1. State the technology used in the following computer generation: [2 Marks]
   • i) Fourth generation: ____________
   • ii) Second generation: ____________
2. Explain the meaning of the following terms as used in the internet: [2 Marks]
   • i) Website: _____________________________________________________________
   • ii) Internet Service Provider: ____________________________________________
3. State four file organization methods in a computer. [4 Marks]

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4. State two ways of ensuring proper ventilation in a computer room. [2 Marks]

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5. a) Name any two examples of Word Processing packages. [2 Marks]

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   b) Explain the following terms as used in spreadsheets: [2 Marks]

   • i) What If Analysis: ______________________________________________________
   • ii) Graph: ________________________________________________________________
6. a) State two computational computer errors. [2 Marks]

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   b) State two transcription computer errors. [2 Marks]

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7. State two advantages of a USB cable. [2 Marks]

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8. Convert 10.375₁₀ to binary. [4 Marks]

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9. State two advantages of Light Emitting Diodes (LED). [2 Marks]

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10. a) List four ways of controlling computer viruses in a computer laboratory. [2 Marks]

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11. Write in full: [2 Marks]
    • i. CMOS: ___________________________
    • ii. WIMP: ___________________________
12. State the functions of the following keyboard keys: [2 Marks]
    • i. Enter (Return): _______________________________________
    • ii. Tab: ________________________________________________
13. State two advantages of fourth generation languages over low level languages. [2 Marks]

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14. a) Define the term piracy. [1 Mark]

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b) List two ways of controlling piracy. [2 Marks]
– 1. ____________
– 2. ____________

15. State three classifications of micro-computers. [3 Marks]

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    • 2. ---

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Section B: Answer Question 16 and any other 3 Questions

16. a) List any four examples of high level programming languages. [4 Marks]

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b) Define the following terms: [4 Marks]

• i) Flowchart: _________________________________________________________
• ii) Algorithm: ________________________________________________________
• iii) Pseudo code: _____________________________________________________
• iv) Program Control Structures: ________________________________________

c) Draw a flowchart for a program that calculates total and average marks for students. [7 Marks]

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17. a) i) Define a translator and state two examples of translators. [3 Marks]

• Definition: ________________________________________________________

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• 2. ---

ii) Name three iteration (loops) program control structures. [3 Marks]

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• 2. ---

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b) Arrange the following in descending order: BIT, WORD, BYTE, NIBBLE. [1 Mark]

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c) a) i) What is disk partitioning? [1 Mark]

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ii) Explain two circumstances that will necessitate a computer user to partition a disk. [2 Marks]

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d) Define the terms: [2 Marks]

• i) Disk compression: _____________________________________________
• ii) Disk defragmentation: __________________________________________

e) State any three keyboard keys under the category of cursor movement and editing keys. [3 Marks]

• 1. ---

• 2. ---

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18. a) Describe each of the following data processing methods and give an example of where used: [6 Marks]

• i) Online processing: ______________________________________________
• ii) Batch processing: _______________________________________________
• iii) Real-time processing: ____________________________________________

b) Make a difference between: [6 Marks]

• i) Logical file and physical file: ______________________________________
• ii) Master file and backup file: _______________________________________
• iii) Interpreters and compilers: ______________________________________

c) State how threats to data integrity can be minimized. [3 Marks]

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19. a) State the meaning of electronic spreadsheets and provide two examples. [3 Marks]

• Meaning: __________________________________________________________

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b) State four features of a spreadsheet. [4 Marks]

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c) State the roles of the following parts of the MS Excel application window. [4 Marks]

• i) Formula bar: _________________________________________________
• ii) Name box: ____________________________________________________
• iii) Cell: _________________________________________________________
• iv) Column and Row headers: ________________________________________

d) Study the spreadsheet below and use it to answer questions that follow:
(Insert Spreadsheet Image/Example Here)

• a) Identify and explain the formula used in cell D2. What result will it produce? [1 mark]
• b) Explain the function used in cell E2. What will be the output for the laptop? [1 mark]
• c) Cell D4 shows a #VALUE! error. State ONE possible cause of this error and suggest how to fix it. [1 mark]
• d) Describe the steps you would follow to edit the formula in cell E3 to change the condition from 100000 to 50000. [1 mark]

20. a) State three reasons why a computer system uses binary to represent data. [3 Marks]

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b) Distinguish between ASCII and BCD coding schemes. [2 Marks]

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c) Compute the following using two’s complement: [-20₁₀ – 18₁₀] [6 Marks]

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d) Convert the following number systems to binary.

• i) AB32₁₆ [2 Marks]
• ii) 635₈ [2 Marks]

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Good Luck!