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KCSE CLUSTER TESTS 25

Computer Studies Paper 1

SECTION A (30 Marks)

1.

-Store data to be processed.

-Store processed data temporary.

-Store instructions used to process data.

3 marks

2.

-Antiglare screens.

-Proper laying of power and interface cables to avoid shocks.

-Proper ventilation.

-Proper lighting.

3 marks

3.

-Using computers to register voters.

-Using computers to verify registered voters.

-Avoid double registration of voters.

-Eliminate double voting.

-Eliminate gost voters.

3 marks

4.

-User friendly refers to the ease with which a software program can be used.

3 marks

5.

Insert model – when inserting a character at the cursor position, the characters a head of the curser are pushed forward and the character is inserted. In type over mode when inserting a character at the cursor position, the immediate character after the text cursor is replaced with the new character inserted.

2 marks

6.

-Easy to format

-Easy to edit.

-Large information can occupy small space e.g a CD or flash memory.

2 marks

7.

-Is a security code that is used to secure one’s document against unauthorized access. Characteristic include;

i. It should be secrete i.e should be known to the owner of the document only.

ii. Should be hard to guess but easy to remember.

2 marks

8.

Wired network because;

i. More secure than wireless network.

ii. Less expensive to set up.

3 marks

9.

Use of human Biological characteristic such as finger prints, face book, voice patters, colour of eyes e.t.c in order to uniquely identify a person

3 marks

10.

i. Number of pixels per unit inch (i.e resolution)

ii. Dot pit i.e distance between the pixels.

2 marks

11.

A reference model is a blue print that outlines the way devices should communicate in a Network. Examples include;

i. OSI (open systems interconnection) model.

ii. TCP/IP (Transmission control protocol /internet protocol model.

2 marks

12.

In relative cell referencing – cell references in a formular change automatically when the formular is copied from one location to another in absolute cell referencing cell references in a formula do not change when the formula is copied from one location to another.

2 marks

13.

An entity is anything physical or non physical about which there is need to store information about.

An attribute is anything that qualifies to give more information about an entity.

3 marks

14.

a. Superscript – a character that is raised above the typing base e.g 24, 4 is a superscript.

b. Subscript – a character that is lowered below the typing base e.g 24, 4 is a subscript.

c. Section breaks –This is marks that show the beginning of a section within a page.

2 marks

15.

4 marks

16.

16 marks

SECTION B (20 Marks)

COMPULSORY
17.

15 marks

SECTION C (0 Marks)

Answer any TWO questions
18.

20 marks

19.

15 marks

20.

a.

M – Operating system.

N- Application software

b.

1. Automation of tasks

2. Offers large storage capacity

3. Easy to install and use. .

4. Readily available
c.
1. Classification according to number of tasks.

2. Classification according to number of users.

3. Classification according to user interface.
d.
1. When dealing with a large number of respondents.

2. When there’s limited time to gather data since interviews are time consuming and difficult to prepare.

3. Questionnaires enhance sincerity of the respondents in giving out information.

e.

Backup -Used to hold copies of the original data /information for security reasons.

Reference –Used for look –up purposes.

State two types of database relationships

- One to one relationship.

- One to many. - Many to many

20 marks

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