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Evaluation

REVISION QUESTIONS

Computer Systems

  1. What is a computer system?
  2. Differentiate between a computer and a computer system?
  3. A scanner used at points of sale terminals in supermarkets is an example of ___________________ scanner.
  4. The automated input technique where keying of input data is eliminated is sometimes referred to as ______________________________.
  5. The type of scanner used to grade multiple choice examination is called _____________________.
  6. Name three factors one would consider when selecting data entry method, and give a reason why each is important.
  7. Explain how banks use MICR scanners for cheque processing
  8. Describe two situations in which speech recognition devices may be useful as a method of data entry
  9. Optical scanning of universal product code is now widely used as input method. Give an example of a place where it is used and explain how it is used.
  10. Describe three different optical and two magnetic scanning techniques used for input. Give an example of the use of each.

Computer Systems Marking Scheme

REVISION QUESTIONS

Central Processing Unit

  1. Define the term central processing unit?
  2. Describe three functions performed by the CPU.
  3. What is a microprocessor?
  4. Explain the functions performed by
  5. The control unit
  6. The arithmetic logic unit
  7. The main memory
  8. Define the terms: volatile memory and non-volatile memory.
  9. Define and explain the difference between RAM and ROM.
  10. How many characters (bytes) of data are held in each of the following memories? 4KB,640KB,16MB and 20GB?
  11. Name three special purpose memories found either inside or outside the microprocessor, and explain what each does.
  12. In reference to arithmetic and logic unit, explain the meaning of logic operations and give an example of this processing operation.
  13. What is the differences between the mainframe’s CPU and that of a microcomputer?
  14. Explain the purpose of the system clock?
  15. What is the meaning of BIOS, and what role does it play in a computer?
  16. List three buses found in the CPU.

 Central Processing Unit Marking Scheme

REVISION QUESTIONS

Output Devices

  1. Differentiate between soft copy and hard copy.
  2. What is the difference between a CRT monitor and a flat –panel display.
  3. Give three examples of flat-panel monitors available in the market today.
  4. Name four criterial used when selecting a printer.
  5. Distinguish between impact and non-impact printers and give two examples of each.
  6. State one advantage and one disadvantage of laser and inkjet printers respectively.
  7. Give two examples of sound output devices.
  8. Karuru Road Construction Company (KRCC), intends to buy an output device they can use to produce road maps. Which device would one advice the company to boy and why.

Output Devices Marking Scheme

REVISION QUESTIONS

Secondary Storage Devices and Media

  1. Distinguish between primary and secondary storage devices.
  2. Distinguish between removable and fixed storage.
  3. Compare three types of removable disks i.e. floppy, zip and jaz disks in relation to size.
  4. What is a hard disk? How does it differ from floppy disk?
  5. What are the advantages of the hard disk over the floppy disk?
  6. Give four examples of optical disks and how they differ from each other in terms of storage capacity and mechanism.
  7. What are the advantages of a digital versatile disk over a typical compact disk?
  8. Define the term multimedia and list down the components required to make a computer multimedia.
  9. Why are CD-ROMs and CD-Rs referred to as WORM?
  10. Describe the difference between magnetic and optical storage media.
  11. A jet publisher is a company that specializes in production of newspapers. One of the editors wanted to transfer a 50MB document from the hard disk of one of the computers using a removable storage media. Give four examples of the devices he/she could use.
  12. Describe three precautions you would take to avoid damaging the hard disk.

 

REVISION QUESTIONS

Computer software

  1. Differentiate between system software and application software giving an example in each case.
  2. What is the importance of an operating system?
  3. Give five examples of application software and their respective uses.
  4. What are the advantages of standard software over the in-house developed software?
  5. What is the difference between single-purpose programs and integrated software?
  6. Why do computers need a network software?
  7. Give three examples of operating systems.

Computer Software Marking Scheme