Computer Studies Paper 1 Questions - Mangu High School Mock Exams 2022

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QUESTIONS

SECTION A: (40 MARKS)
Answer ALL the questions in this section in the space provided.

  1.                                
    1. A computer laboratory should be constantly kept dust and smoke free. Specify two effects that dust would have on the operation of computers.
    2. Why should you first switch on the UPS before switching on the system unit and the monitor?
  2. Explain the meaning of backup.
  3. State the following types of transcription errors.
    1. 3455 instead of 3456....
    2. Smith instead of simth.
  4.                        
    1. State three ways used to represent a negative number.
    2. Perform the following binary arithmetic giving the answer in decimal notation.
      1110.0111 + 1101001.011
  5. Distinguish between data privacy and data integrity as used in computing.
  6. Differentiate between a primary key and a foreign key while designing a database.
  7. Distinguish between 'count' and 'countif" functions as used in spreadsheets.
  8. Match the following statements with repeater, router or a bridge.
     STATEMENT  DEVICE
    Operates at data link layer  
    Determine the best path for data to follow  
    Regenerates signals  
    Fowards everything which it doesn't recognize  
  9. Explain the impact of Information Technology on organization in each of the following areas.
    1. Competition.
    2. Pace of growth
  10. List two roles performed by system analyst.
  11. Explain the following internet related terms.
    1. Sign IN
    2. Search engine
    3. Surf
    4. Sign up
  12. In Kenya Tea Packers Company, several people are employed as record clerks, typists and messenger. The company intends to introduce a computerized system in all the departments. Suggest three reasons that would make workers unhappy with the new system.
  13. State two magnetic Storage devices.
  14. State three functions of Central Processing Unit.
  15. For each of the following file organization methods, state an appropriate storage medium:
    1. Serial
    2. Random

SECTION B: (60 MARKS)
Answer question 16 (compulsory) and any other THREE questions from this section.

  1.                    
    1. Study the flowchart below and answer the questions that follows.
      16 zzadada
      1. State the name of the control structure shown in the flowchart.
      2. Assuming the user keys in 8 and 14 when prompted to enter the values for M and N respectively, determine the printed values of P, Q, x and y.
      3. Write the pseudocode that would be used in place of the flowchart
    2. What is the difference between looping and selection.
    3. Name the stage of program development cycle when: 
      1. A user guide would be written.
      2. A programmer dry-runs the code.
      3. System charts would be drawn.
  2.                                
    1. What is Virtual reality?
    2. Explain the following interactive sensory equipment used in virtual reality. 
      1. Head gear.
      2. Body suit.
    3.                      
      1. What is Artificial Intelligence?
      2. State and explain three components of an experts system.
    4. Most computerized security systems make use of Biometric analysis, name three physical features of human beings that can be considered in this analysis.
  3.                  
    1. Explain two coding schemes used in data representation techniques.
    2. Using one's and two's complement work out 14-9.
      1. One's complement.
      2. Two's complement.
    3. Work out the hexadecimal equivalent of 1011111000112
    4. Identify the following types of ports
      18 d adadad
      A....................................................
      B....................................................
      C....................................................
      D....................................................
      F....................................................
  4.                                  
    1. Explain two functions of an operating system,
    2. Explain the following terms as used in disk management using operating system: 
      1. Disk defragmentation.
      2. Disk clean up.
    3. What will happen if you attempt to delete a folder while a file contained in it is Open?
    4. State two properties that an operating system displays about a file.
    5. Give four advantages of storing files in folders,
  5.                    
    1. The diagram below shows four common network topologies A, B, C and D.
      20 SsADAD
      1. Name the network topologies labeled A, B, C and D.
      2. Explain what happens if server X in topology A fails.
      3. List two problems associated with network topology B.
      4. List two disadvantage associated with network topology labeled D.
    2. Differentiate between Internet and World Wide Web.
    3. Describe the following network services and identify their applications.
      1. Voice mail.
      2. Video conferencing.

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