Describe the term portability as used in the following context.Hardware
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PETER USED A COMPACT DISK RECORDABLE TO SAVE HIS WORK. ½ OF THE DISK WAS USED TO STORE VIDEO FILES WHILE ¼ OF THE REMAINDER WAS TO SAVE AUDIO FILE. NOTE THAT CD-RECORDABLE IS 700MB. CALCULATE THE REMAINING SPACE IN BYTES.Video =0.5 x 700= 350 …………………… ½ mark
Audio = 0.125 x 700=87.5 ………………… ½ mark Total = 437.7 …………………… 1mark Remaining spaces (700-437.5) = 262.5MB ………… 1mark
EXPECTED RESPONSE
List three uses of DVDs. (3mks)
Define portability as used in software selection. (1mk)
Portability refers to whether a program can be copied or installed in more than one computer
List four ways of acquiring software in an organization. (2mks)
Differentiate between a line printer and a page printer as used in computers. (2 marks)
A line printer is an impact printer that prints one entire line of text at a time
while a page printer is a non impact printer that prints a Whole page at a timer 
Explain two problems associated with the computer hard disk.
Problems of computer hard disk
Describe each of the following computer cables: Parallel cable and Serial cable;
Description of computer cables
a) Parallel cable
The management of an organisation intends to purchase a printer. State three factors that they should consider during the purchase
Factors to consider when purchasing a printer
State the meaning of the term computer software.
Computer software
Explain three ways in which an operating system provides data security in a computer system14/1/2021 Explain three ways in which an operating system provides data security in a computer system
Access control:
(b)State two instances where observation is not a viable method of gathering data during system analysis stage.
I. repeater
I. Identify the component labelled P.
Explain two health issues that could arise from the use of unsuitable computer desk.
(i)Name two devices that may be used for storing data for a long duration.
State the functions of each of the following keys on the computer keyboard:
(a) backspace;
State the meaning of the term disk defragmentation as used in computers.
(a) generating receipts where carbon copies are required;
(b)an architectural drawing where precision is required; (c) producing document output for a visually impaired person.
(a)Carbon copies - impact printers e.g. dot matrix.
(b)Architectural design - plotter (c)Visual impairment - speakers/brailles 
List two techniques of acquiring electronic images to be used in a desktop publishing program.10/1/2021 List two techniques of acquiring electronic images to be used in a desktop publishing program.
(ii) Describe two layout guides in a desktop publishing program (DTP) that assist a user to place an object in a preferred position.
(b) Explain three ways of ensuring that data submitted for processing is accurate. (c)An engineering company requires a computer system to design roads and bridges. Explain one suitable choice for: (i) output device; (ii) software.
RESPONSES
(a) (i) Ways of acquiring images in DTP:
(ii) A CAD software because it facilitates in the design of engineering drawings. 
State three circumstances under which voice input would be preferred over other methods of data capture.
Circumstance for voice input
List four factors to be considered when acquiring a printer.
Factors to consider when acquiring a printer
State three benefits of using optical magnetic reader to register candidates for an examination.8/1/2021 State three benefits of using optical magnetic reader to register candidates for an examination.
Benefits of using OMR
List four devices that use scanning technology that would be used to capture data directly from the source.
Direct input methods
A) Explain three features of a graphical user interface as used in computers. (6 marks)
B) State the function of each of the following computer keyboard keys:
(i) Caps Lock (1 mark)
(ii) Shift (1 mark) (iii) Home (1 mark)
(i) Function of Caps lock
- It’s a toggle key when ON, the characters typed are in uppercase when OFF, the characters typed are in lower case. (ii) Shift key - Used to enable uppercase letter to be printed when alphanumeric keys are pressed. - Used with other keys to modify behavior/function key. (iii) Home key - Used to take the cursor to the beginning of the line in a word processor. - Evidence of movement of the cursor. C) Using two complement notation, determine the value of the operation 2510 — 2910 (6 marks)
State four factors to consider when selecting an input device for use in a computer room. (4 marks)1. user needs
2. Initial cost
3. Maintenance cost
4. Mode of transmission
5. Amount of space it occupies
6. Compatibility with available hardware
7. User- Friendliness
(a) Explain the term toggle key as used in computer keyboard. (2 marks)
(b) List examples of toggle keys on a computer keyboard. (2 marks)
Explain two contents of a warranty that should be considered when purchasing computer hardware.6/1/2021 Explain two contents of a warranty that should be considered when purchasing computer hardware.
Two factors to consider when evaluating warranty
List the two categories of system software.
Categories of system software
State one function for each of the following elements of a computer system:(a) hardware;
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