Explanation

A CD-ROM (Compact Disc, read-only-memory) is an optical disc which is designed to store computer data in the form of text or graphics or software data.

A normal CD-ROM usually can store up to data is 680 MB.

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RY17-012-23

Explanation

A scanner is an input device that scans documents such as photographs and pages of text. A scanner is not an external memory.

Explanation

Ctrl + R = use for Align selected text to the right.

Ctrl + E = use for Align selected text to the centre.

Ctrl + J = use for Justify paragraph alignment.

Ctrl + L = use for Align selected text to the left.

Ctrl + Q = use for Align selected paragraph to the left.

Explanation

A person who used his or her expertise to gain access to other people's computers to get information illegally or do damage is a Hacker

There are three types of hackers:

• White hat professionals hack 
• Black hat hackers hack 
• Grey hat hackers 

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ND4-12-2022

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RY 16-01-2023

Explanation

Optical fiber uses the optical principle of "total internal reflection" to capture the light transmitted in an optical fiber and confine the light to the core of the fiber.

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RY 15-01-2023

Explanation

A motherboard is the main printed circuit board (PCB) in a computer.

The motherboard is a computer's central communications backbone connectivity point,

Motherboards can be found in virtually all computers, especially desktop and laptop PCs

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ND16-1-2023

Explanation

Explanation

A system unit is the part of a computer

It includes the motherboard, CPU, RAM and other components, 

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ND10-1-2023

Explanation

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ND10-1-2023

Explanation

Joysticks are often used to:

control video games,

and usually have one or more push buttons whose state can also be read by the computer

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ND8-1-2023