Chapter Two: Computer Hardware

Question 1

What is the purpose of the CPU?

Answer 1

The CPU carries out all of the processing in a Computer.

Question 2

State one advantage and one disadvantage of a dual-core processor over a single core processor.

Answer 2

They use multiple CPU’s working together.

There is more data is being processed simultaneously.

Question 3

Why does a computer have both RAM and ROM?

Answer 3

RAM is used for the storage of programs, whereas ROM stores instructions and data required to start up the computer.

Question 4

How would installing extra RAM affect the use of virtual and what effect does this have on the performance of the computer?

Answer 4

Adding more RAM reduced the use of virtual memory and improves the performance of the computer.

Question 5

What is flash memory and why is it used?

Answer 5

Flash memory is a type of ROM that can be rewritten. It is used as a portable medium for storing and transferring data.

Question 6

Identify two input devices and two output devices on a mobile phone.

Answer 6

Output:
Speakers;
Display on the screen.

Input:
Keyboard;
Camera.

Question 7

Why does a computer need secondary storage?

Answer 7

Secondary storage is needed to store data and programs when the power is switched off.