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2019 MOKASA Computer Studies Paper 1

  1. Differentiate between embedded computer and dedicated computer                         (2 marks)
  2. The current monitor technology uses LED back lit technology. Give two advantages of using TFT monitors over CRT monitors                                                             (2 marks)
  3. A Form four student wants to send a large document to a printer.
    1. State the name for the area of memory that the document is sent to immediately from RAM. (1 mark)
    2. As the printer runs out of paper during printing, the operating system sends a signal back to the computer to stop temporarily. Name this function of the operating system
  4.  Differentiate between a flash memory and compact disk as used in computer storage devices. (2 marks)
    1. b) People like using DVDs over compact disks yet they are of the same physical size. State three reasons that justifies this.                         (3 marks)


  5. For a monitor to display images, it must be connected through video port to a video adapter or controller mounted on the mother board. What is the role of a video adapter?                                     (2 marks)
  6. Name four categories of input devices             (2 marks)
  7. State any two physical measures taken to protect a computer laboratory from unauthorized access. (2 marks)
  8. Most word processors have some automated features such as word wrap and type over modes. Describe these features                                                                                                            (2 marks)
  9. Differentiate between proofreading and formatting a document as used in word processing          (2 marks)
  10. Most computerized systems in different organizations face a lot of unauthorized access such as Eavesdropping, Surveillance and Industrial espionage. State a control measure against each vice.
  11. A world wide web is a vast virtual space in the internet where information is made available such as web portals and blogs. Different between a web portal and a blog.
  12. Differentiate between filtering and hiding of rows/columns as used in spreadsheets                          (2 marks)
  13. Industrial plants use computer systems in different ways such as Computer Aided design, manufacturing, Simulation and process control. Explain how computers are used in the mentioned areas above. (4 marks)
  14. a) Differentiate between Job displacement and Job replacement.             (2 marks)
    1. b) State three advantages of using automated production in manufacturing plants. (3 marks)
  15. Due to high demand and dynamic nature of computers and information systems, there is need for qualified computer trainers. What are the roles of computer trainers?

SECTION B

17. b) State four factors to be considered when designing a good database                                    (4 marks)

c) Explain the use of each of the following field data types as used in database (3 marks)

  1. OLE object
  2. Lookup wizard
  3. Memo
  1. d) Kibet has been experiencing a lot of problems in his computer. As a result, he decided to format his computer and re-installed a new operating system.
  2. What is formatting in relation to the above context             (2 marks)
  3. What precaution must Kibet observe before formatting his computer                                     (1 mark)
  4. e) You are required to purchase an operating system. State three factors that you should consider before acquiring the software.                                                                                                               (3 marks)

18. Define the following terms as used in networking                                                                        (3 marks)

i) Broadband

ii)Bandwidth

iii)Multiplexing

b) List four elements of networking                                                                                                  (2 marks)

d)     Most institutions are moving towards the use of fibre optic cables. State three reasons why fibre optic is             preferred

e) Differentiate between Hub and Bridge as used in networking.                         (2 marks)

f) The diagram below represents a signal transmission from point A to point E. Name the parts labeled    A, B, C, D, E

19 a) Binary systems has been used to develop most electronic devices. Give three advantages of using binary.

  1. b) Convert the following number systems             (4 marks)
  2. 62510 to binary
  3. EF16 to Octal

 

  1. c) Using twos complement, perform the following arithmetic operation leaving your answer in decimal notation. (4 marks)

3910 – 1910

d) A MOKASA student was developing a file. List any four attributes that the student must consider in the development process (2 marks)

20. a) A system analyst in Changamwe preferred using phased changeover to implement a new system. State three reasons for this preference.

b) State three reasons why an organization may change an information system. (3 marks)

c) Different students were asked to state the characteristics of a system. The responses were:

  1. They are holistic
  2. They are open or closed systems
  3. They have a boundary and environment.

Explain each of the above responses.                                                                                                     (3 marks)

  1. e) Explain the following data collection stages as used in data processing (3 marks)
  2. i) Data preparation
  3. ii) Media conversion

iii) Input validation

f) State three ways a data entry clerk may use to reduce threats to data integrity                           (3 marks)

2019 MOKASA PAPERS