2020

Question 1

1.. magnetic device that is used as internal memory
2.. international standards of which the goal is to extend the ASC11 to a 16-bit code
3.. peripheral with a lever which can move in different directions
4.. changes the digital data for the computer into analog data that can be transferred by telephone line
5.. use a spray head that’s squirts drops of ink onto the paper to form characteristic signs
6.. network that directly connects computer separated by long distance
7.. program which can delete files containing valuable data
8.. audio input device that records music and voice input into the computers users computer

Answer 1

1..L
2..A
3..G
4..K
5..D
6..J
7..I
8..H

Question 2

1..Name any five sections of a keyboard
2.. briefly explain operating system and application software and give two examples for each
3.. explain how you activate Windows explorer

Answer 2

1.. numerical key
*functional key (marked F1-f2)
*alphabetical key( typewriter)
*special function key (modifier)
*arrow key direction
*Windows key

2 ..operating system activates the computer
:allows the user to communicate with the computer
:controls the functioning of the computer and enables the computer to run application it is a primary system element of all software *example MS-DOS, Windows 8, blackberry and Android

Application software are programs designed to be carried out by a computer to satisfy a user specific needs
: it turns the computer into a tool for a specific use
:they are used once the operating system has been loaded
*example word processing spreadsheet ,database

3.. clicks that menu
* select and click on all programs
select accessories
* window explorer will appear
* click on it

Question 3

1… Define what a computer virus is and give any three example of a computer virus
2… List five ways a computer user can use to protect a computer against a virus infection

Answer 3

1.. a computer virus is a program that has to be run in order to replicate or do any damage
*examples-
file virus
-boost sector virus
-the worm
-the Trojan horse
-spyware

2.. avoid downloading software
* avoid sharing discs on computers and network
* install an antivirus program
* check all discs and downloaded files by scanning with antivirus program
*do not open any link or strange email attachment

Question 4

Explain the functions of the following components
*Keyboard
*Stylus
*Mouse
*scanner
*USB
*printer
*digital camera
*headphones

Answer 4

*keyboard is the input peripheral is to enter data into the computer
*Is used to create diagrams or graphs drawing on the screen
*Mouse is appointing device that is used instead of keyboard
*Scanner used to read text image and graphs on paper and convert them into machine readable character
*This is used as a mobile storage
*Printer is used to produce paper copies of the information from the computer
*Digital camera is used for taking steel photographers and storing the results electronically in memory
*Headphones used to listen to music or recorded voices

Question 5

Describe the difference between backup and diskcopy

Answer 5

Backup is coping information on hard disk in order to keep original data in the event of accidentally erasing over writing or damaging data
Disc copy works with removable discs that must be of the same type message prompt you insert the source and destination