COMPUTER Paper 1 Questions - KCSE 2022 Past Papers

Instructions to candidates

• This paper consists of two sections: A and B.
• Answer all the questions in section A
• Answer question 16 and any three questions from section B
• Candidates should answer the questions in English.

1. State the components of a computer system which performs each of the following tasks:
   1. Comparisons of numbers   (1 mark)
   2. Convert data into a computer format    (1 mark)
   3. Coordinate operations of an entire computer.  (1 mark)  '
2. Explain the term system files as used in opertaing system  (2 marks)
3. Explain the term label as used in a spreadsheet program.
4. Ahmed noted that some documents in his office computer were illegally accessed from other computers in his organization's network. State two control measures he should put in place to prevent further access.   ( 2 marks)
5. Figure 1 shows an extract from a spreadsheet program used by a shopkeeper to compute the total cost of items in stock.
   
   Write a function that would be used to obtain the total cost of cooking fat.   (2 marks)
6. Emmanuel inserted a textbox and types some text in it while workinig with a desktop publishing program. He realised that some of the text he had typed was not visible. State three ways in which he could make the text visible.   (3 marks)
7. Explain the term software documentation as used in systems development.     ( 2marks)
8. State three types of errors that may occur during computerised data processing.    (3 marks)
9. Mary has been employed as a Web Administrator in a media house. State three offical duties that she is likely to be assigned by her supervisor.      (3 marks)
10.  
    1. Explain the term time slice as used in computer data processing.     (2 marks)
    2. State two advantages of multiprocessing mode of data processing.     (2 marks)
11. State two differences between a transaction file and a report file as used in data processing.    (2 marks)
12. State three disk management activities that may be performed on a computer's hard disk during formatting operation.( marks)
13. The following is alist of computer output devices: 
    speaker, plotter, screen projector, touch screen, LCD, printer
    Categorise each of them as either softcopy output devices or hardcopy output devices.  (3 marks)
14. State three advantages of using a wireless computer keyboard.  (3 marks)
15.  State three types of objects that may be created in a database during the design stage. (3 marks)

SECTION B

Answer question 16 and any pther three questions from this section.

16.  
    1. State three advantages of machine programming languages.  ( 3 marks)
    2. Describe two types of translators as used in computer programming.  (4 marks)
    3. A financial institution would like to computerise its loaning processes. To ascertain the legibility of a borrower, the system should accept a customer's ID number and check whether the customer has previously defaulted the repayment of any loan. If the customer is reported to have defaulted, the message DEFAULTER is displayed, otherwise the amount of loan requested is granted. If the amount requested is greater than or equal to 1 million, a repayment of 6 years is displayed, if the amount is greater then 500,000 and less than 1 million, a repayment period of 3 years is dispplayed. Otherwise a repayment period of 1 year is displayed.
       Draw a flowchart to represent the logic of the computerised system.  (8 marks)
17.  
    1. With the aid of an example in each case, state one difference between a nibble and a byte as used in computer data representation.  (3 marks)
    2.  
       1. Convert the bimnary number 11101.101₂ to its decimal number equivalent.  ( 3 marks)
       2. Perform the following binary arithmetic operation using two's complement.   1110₂ − 1001₂   (2 marks)
    3. State two differences between BCD and EBCDIC as used in computer coding scheme.  ( 4 marks)
    4. Ann would like to use a smart phone to attend an online lesson, where a teacher is using video presentation. State three features that a smartphone must have for an effective online lesson.       (3 marks)
18.  
    1. Explain each of the following terms as used in Information and Communication Technology (ICT)
       1. Electronic Funds Transfer (EFT)   ( 2 marks)
       2. blogging  ( 2 marks)
       3. simulation ( 2 marks)
    2. Distinguish between pilot change over and parallel change over as used in system development.   ( 4 marks)
    3. Philip has developed a computerised system for a school and is currently in its implementaion stage.
       1. State three activities which he would carry out at this stage.    ( 3 marks)
       2. State two technical personnel who would be involved during this stage.   ( 2 marks)
19.  
    1.  
       1. State two differences between serial and parallel cables as used in computers.   ( 4 marks)
       2. Name four cables other than those in 19(a)(i) that are used to connect a computer with other devices.   ( 2 marks)
    2. Describe each of the following qualities of information:  
       1. Completeness  ( 2 marks)
       2. Timeliness  (2 marks)
    3. State the function of each of the following features in word processing:
       1. Word wrap  (1 mark)
       2. Sort  (1 mark0
       3. Indent  (1 mark)
    4. A hard disk of a computer was reported to have crashed. State two control measures that should have been put in place to prevent such an occurrence.   (2 marks)
20.  
    1. Explain the effect of each of the following occurrence in a computer network:
       1. A bi=us network topology with a missing terminator    (2 marks)
       2. A uni-directional ring network topology with one computer not operational (2 marks)
       3. A star network topology with a hub not operational  (2 marks)
    2. A school intends to connect their computer labs with the school administration block using a fibre optic cable. State three benefits that the school will realise from using the cable.   (3 marks)
    3. Explain each of the following terms as used in data security:
       1. recycle bin   (2 marks)
       2. patch   (2 marks)
       3. tapping  (2 marks)