1. a)Why should one connect a computer on a network (2 mks)

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1. The CPU consists of control unit and arithmetic logic unit. State the functions of the two units (2 mks)

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1. Name and explain the two types of Monitors (3 mks)

1. State the functions keys in a computer key board

1. Enter keys (1 mk)
2. Page up-page down keys (1mk)

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1. (i) Explain the importance of network software in a computer (2 mks)

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1. Give two advantages of using Winchester(Hard disk driver)Over compact discs

(2 mks)

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1. Outline two areas were computers are used (2 mks)

1. One stage of system development is system testing. Outline the advantages of this stage before implementation (1 mk)

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1. (a)Convert 101.11110₂ to decimal notation (2 mks)

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State one function of each of the following terms (3 mks)

(i) System unit

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(ii) Ram

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(iii) Modem

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. Explain any two factors that should be put into consideration when putting up a computer laboratory. (2 marks)
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i)Define the term graphic and give two examples (2 mks)
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ii)List any two sources of graphic that can be used in Microsoft word (1 mk) …………………………………………………………………………………………………… ……………………………………………………………………………………………………

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State the functions of the following tools used in excel (3 mks)
(a) Undo……………………………………………………………………………………………… ……………………
(b) Insert chart……………………………………………………………………………………………………… …

(c) Copy and paste…………………………………………………………………………………………………
(i) Why would one prefer to use a form for data input rather entering data directly into
a table (2 mks)
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(ii)When using wizard to create a form,list four forms layout that you can use (2 mks)
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Give two advantages and disadvantages of impact printers (4 mks)
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(a) Define the following terms
(i)Amplitute(A)

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…..………(1mk)

(ii)Frequency (f)

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(iii)Periodic time (t)

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b)Distinguish between Modulation and demodulation (2 mks)

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(c) Explain the concept of data representation in digital circuits (6 mks) ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… …………………………………………………………………………………………………

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(d) Explain the following terms (4 mks)

a) Bit

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b) Bytes

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c) Word

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d) Anibble

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(a)Define the following computer crimes (1mk)
(i) Piracy

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(ii) Industrial espionage
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b) Explain two ways of protecting data and information against unauthorized
Access (4 mks)

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(c) Explain two tasks performed by the operating system (4 mks)
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(d) Differentiate between a hardware and orgware (2 mks)
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(e) List down three duties of a computer trainer (3 mks)
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(a) Identify the human computer Interface below (2 mks)

15 marks