Distinguish between logical and physical files.

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State three ways in which computers can be used in

(a). Financial institution. (1 mark)

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(b).Transport system. (1 mark)

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List four techniques of using a mouse. (2 marks)

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(a). Define deadlock (1 mark)

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(b). State four devices under the influence of an operating system. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………................................................................……………………

(a). Explain two advantages of using universal serial bus. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ……………………………………………….................................................................………………

(b).Explain one reason why parallel cables are faster than serial cables in data transmission. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………...............................................................………………

(a). Differentiate between disk partitioning and disk clean up. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………...............................................................……………

(b). List any three parts of an application window. (3 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………….................................................................……

State two peripheral devices connected to a computer via PS/2 port. ………………………………………………………………………………………………………… ……………………………………………………………...............................………………………

List any two factors to consider when choosing an operating system. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………….............................................................

A computer teacher wants to minimize illegal entry of people to a computer laboratory. Explain measures which to be put in place in order to curb this illegal entry.

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(a). State four keyboard keys that work in a state of ON/OF switches in operation. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ……………………………………………................................................................…………………

(b). Describe two precautions one need to undertake when connecting a hard disk to a computer. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………...............................................................………

(a). Give two reasons why it’s difficult to detect and prevent a computer crime. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………..............................................................……

(b). State the difference between autocorrect and auto complete as used in word processing. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………..............................................................………

(a). Define the term

(i). System tray (1 mark)

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(ii). Task Manager

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(iii). Icon (1 mark)

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(iv). Trouble shooting. (1 mark)

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(a). What is real time? (1 mark)

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(b). Explain how real time differs form distribution processing mode. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

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(a). Describe three disadvantages of using monolithic program. (3 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………
(b). Explain the uses of the following in desktop publishing.

(i). Master page (1 mark)

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(ii). Tracking (1 mark)

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Study the flowchart below and answer the questions that follow

(a). List the various outputs from the flowchart above. Show your working. (5 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

(b). Write a pseudo code for the flowchart. (6 marks)

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(c). State two advantages and disadvantages of high level languages. (4 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

You are provided with two types of desktop publishing tools.

(a). Identify tool

(i). R- (1 mark) ………………………………………………………………………………………………

(ii). Q- (1 mark) ………………………………………………………………………………………………

(b). State three method of transforming on object. (3 marks) ………………………………………………………………………………………………………… …………………………………………………………………………................................…………

(c). Perform the following binary operation in decimal notation. (3 marks)

(i).10111.111+111.011 (3 marks)

(ii).1111.01-111.11 (3 marks)

(d). Explain any two ways in which you can tell that a computer has been invaded by virus. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………….

(a). (i). What is visual display unit? (1 mark)

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(ii). Explain three examples of video graphic adapters. (3 mark) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

(b). Describe the impact of information communication technology in

(i). Environment (2 marks)

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(ii). Employment (3 marks)

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(c). (i). Define the term system clock. (1 mark)

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(ii). Explain two reasons that may lead to a computer to fail to boot. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

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(d). A worksheet contains the data shown below.

(i).Give the formula that can be used to obtain product of B2 and D2. (1 mark)

(ii). State cell data type that represent cell B1. (1 mark) ………………………………………………………………………………………………………… …………………………………………………………………………...............................…………

(iii). State the value that will be displayed inE2. (1 mark) ………………………………………………………………………………………………………… ……………………………………………………………………………….................................……

(a). (i). Explain three components of satellite. (6 marks)

(ii). State two advantages of 18 a(i) above media. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

(iii). List three examples of radio waves signals. (3 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

(c). Explain two reason why optical cables have become best choice for local areal network. (4 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

(a). Identify three public universities and three National polytechnics in Kenya where further computer training is offered. In case, state the highest level of qualification that can be acquired in computer training. (6 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

(b). Distinguish between “Job replacement” and “Job displacement” in reference to ICT. (2 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

(c). Give four reasons why a firm may decide to computerize its operation. (4 marks) ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

(d). An individual has a right to demand guarantee to privacy of personal information stored on the computer. Give three such types of information. (3 marks)

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