Write an algorithm to computer the area of a circle. (2mks)Pseudocode
Start
input pie = 3.14 area = pie*r*r print area end
Start
input area = 3.14 *r*r print r, area stop
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List four factors to be considered when purchasing an operating system. (2mks)
How does an operating system manage computer memory (2mks)
State the function of each of the following(a) Network Interface Card (1mk)
A device that creates a physical link to the computer and the transmission media
(b) Modem (1mk)
modem converts a signal from digital to analog form for the purpose of transmission over the transmission media
(c) Repeaters (1mk)
receives a signal from one section of a network, clean it to remove any distortion, boosts/amplifies it and sends it to another section
Modem
List three uses of DVDs. (3mks)
(a) Subtract 1102 from 110102 (1mk)
(b) Find the sum of binary number 101.1012 and 110.1002 (1mk)
(c) Convert binary number 11010110.10012 into octal number. (1mk)
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)
List and describe three guidelines that should be followed when conducting an interview during information gathering (3mks)
Name three responsibilities that are carried out by a network administrator. (3mks)
State the function of the following keys on the computer key board (2mks)(a) Insert
Used to switch between the two typeover modes i.e.
(b) Delete
Delete characters from the cursor position from left to right
State two practices to be observed in order to ensure the safety of the computer user. (2mks)
Describe virtual reality as used in computers. (2 marks)
Virtual Reality is the computer generated simulation of a three-dimensional
image or environment that can be interacted with in a seemingly real or physical way by a person using a specialized electronic head gear, 
State three ways of transforming a picture embedded in a Desktop Publishing programme in order to fit in a designated space on a document. (3 marks)
Ways of transforming a picture in a DTP
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 
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