State three functions of networking operating systems other than providing network security.10/1/2021 State three functions of networking operating systems other than providing network security.
(b) Explain three ways in which an operating system provides data security in a computer system.
(c) Explain three circumstances under which observation method may be preferred during data collection.
(a) Functions of network operating systems
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A computer technician found it necessary to disable a firewall when working on a computer system. State two reasons that may have necessitated disabling of the firewall.
When firewall is disabled
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
State three possible causes of fire outbreak in a computer laboratory.
Sources of fire in a computer laboratory
State two advantages of using portable computers.
Advantages of portable computers
List six file manipulation activities that may be carried out using an operating system.
File manipulation activities- creation of files/folders
State two circumstances under which warm booting of a computer may be necessary.
Reasons for warm booting a computer
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)
Differentiate between analogue data and digital data as used in computers. (2 marks)
State three factors to consider when selecting an operating system to install in a computer.7/1/2021 State three factors to consider when selecting an operating system to install in a computer. (3 marks)
 State three functions of Un-uninterruptible Power Supply (UPS). (3 marks)
Functions of the UPS
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)
Give two differences between a Graphical User Interface (GUI) and a Commandline Interface.
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
Explain two health issues that could arise from the use of an unsuitable computer desk.
State one function for each of the following elements of a computer system:(a) hardware;
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