Computer Studies Paper 1 Questions and Answers - Moi Kabarak High School Mock 2020/2021

INSTRUCTIONS TO CANDIDATES:

• This paper consists of TWO sections A and B.
• Answer ALL the questions in section A.
• Answer question 16 and any other THREE questions from section B.
• Candidates should answer the questions in English.

SECTION A
Answer All the questions in this section in the spaces provided

1. State two reasons why it is advisable to follows the correct procedure when shutting down the
   computer at all times.                    (2marks)
2. Name and give the function of the following keyboard symbols.
   
   1. 
          (1 mark)
      Name.............
      Function.......
   2. 
          (1 mark)
      Name..........
      Function..........
3. A computer virus is a destructive program that attaches itself to other files and installs itself without permission on the computer when the files are opened for use. Give three ways in which computers can protected against virus attack      (3marks)
4. State three characteristics of computer main memory         (3marks)
5. A printer fails to work as expected when a document is sent to be printed. The user has checked that the on-line light of the printer is on and the printing paper is correctly inserted. Give two other possible reasons why the printing process failed.         (2marks)
6. Describe the following terms as used in computer data security
   
   1. Firewalls       (1 mark)
   2. Audit trail.         (1 mark)
7. State four ways in which computers are used in banks     (2 marks)
8. A student typed a passage in Microsoft word and the last line of the letter flowed to the second
   page.
   1. What name is given to such last line that flowed to the second page        (1 mark)
   2. State three ways in which the student could have the letter to fit one page without changing the paper size      (3 marks)
9. Explain the following terms as used in Microsoft Excel spread sheet package.      (3marks)
   
   1. Range
   2. What if analysis
   3. Automatic recalculation
10. State the most appropriate data processing mode for the following scenarios:      (4marks)
    
    1. To prepare payroil for workers in Central Bank of Kenya.
    2. For automated production control in a chemical manufacturing industry.
    3. Managing ATMs transactions for KCB Ltd in different towns in the country.
    4. Prepare examination report forms at the end of an academic year.
11. A school has decided to network its computers so that it can distribute information to all its
    departments. The school also intends to upload the information to parents. The various services are to be provided by servers. Briefly describe the services provided by     (3marks)
    
    1. Print server
    2. File server
    3. Mail server
12. Using an illustration, describe the term text direction as used in DTP               (2marks)
    Anna
13. 1. Define the following terms as used in a database
       
       1. Attribute          (1 mark)
       2. Database model            (1 mark)
    2. State two objectives of normalization as used in databases       (2 marks)
14. Differentiate between a system administrator and a database administrator as used in computers
    (2 marks)
15. State two advantages of using automated production in industries          (2 marks)

SECTION B
Answer question 16 and any other three questions from this section

16.  
    1. State the best application area for the following programming language.         (4marks)
       
       1. FORTRAN.......
       2. Mercury .......
       3. PHP ......
       4. C ......
    2. State two differences between compiler and interpreter         (2marks)
       

       Compiler	Interpreter

    3. Study the following pseudocode then answer the questions that follow:
       Start
           R =2
            While R<=6 Do
                   Y=2 + (R^R) + 4
                   Print Y
                   R= R +2
            End while
        Stop
       1. Work out the output from the pseudocode              (4marks)
       2. Translate the above pseudocode to a flowchart          (5 marks)
17.  
    1. Differentiate between the following:
       1. Intranet and Extranet      (2marks) 
       2. Modulation and demodulation            (2marks)
       3. Dial-up and direct ISP connection          (2marks)
    2. Explain the importance of the following
       
       1. Web portal    (1 mark)
       2. Hyperlink          (1mark)
       3. Blog           (1 mark)
    3. Name the parts in the following addresses:
       
       1. This email address is being protected from spambots. You need JavaScript enabled to view it.        (2marks)
       2. www.starshines.sc.ke       (2marks)
    4. Explain the concept of term teleworking as used in computing            (2marks)
18.  
    1. Fill the gaps in the following table    (6marks)
       

       Category of software	Use	Example
       DTP
       		AutoCAD
       	Used for statistical analysis of values

    2. Name the disk management activity described below       (5 marks)
       1. Creates logical drives in a disk
       2. Aligns tracks and sectors in a disk
       3. Allows contents of a file to occupy contiguous sectors for faster access
       4. Creation of copies of important files on another drive
    3. Explain what the following commands will accomplish once executed
       
       1. C:\> Copy S* E:              (2marks)
       2. D:\>Deltree Subjects     (2marks)
19.  
    1. Using examples of a school setup, explain the following changeover strategies       (9 marks) 
       1. Straight change over
       2. Parallel change over
       3. Phased change over
    2. Give two implications of a poorly implemented system change over strategy       (2 marks)
    3. Explain any two characteristics of a system          (4 marks)
20.  
    1. Give three ways of representing signed binary numbers in a computer           (3 marks)
    2. Perform the following binary arithmetic and leave your answer in denary form       (6 marks)
       
       1. 1101.101₂ + 1011.01₂ + 111.11₂
       2. 10001.1001₂ − 1011.111₂
    3. Convert the following:
       
       1. −34₁₀ to twos complement             (3 marks)
       2. 7⁴/₅₁₀ to binary            (3 marks)