1.1 - Central Processing Unit

Question 1

What is a computer system?

Answer 1

A computer with input , output , storage devices, processor making a system to carry out a task.

Question 2

What are the 4 parts of a computer system?

Answer 2

Processor
Input
Output
Storage

Question 3

What are input devices’s function?

Answer 3

Input devices allow you to put data into your computer.
Eg: keyboard

Question 4

What are output devices’ function?

Answer 4

Output devices let you see the results of your work on the computer.
Eg: computer screen

Question 5

What are storage devices’ function?

Answer 5

You use storage devices to save your work

Question 6

What is the processor’s function?

Answer 6

It does all the work in a computer system. it contains all the circuits required to process input, store data, and output results.

Question 7

Where is the processor located in the computer system?

Answer 7

At the centre of your computer system is a processor.

Question 8

What are microprocessors?

Answer 8

A small chip of silicon with all the components of a computer processor built onto it.

Question 9

How small are microprocessors?

Answer 9

A microprocessor is small enough to fit on your fingertip.

Question 10

What does CPU stand for?

Answer 10

Central Processing unit

Question 11

What is a CPU?

Answer 11

The term is used to describe the main computer processor, because there may be other processors in a complete computer system.

Question 12

What is another term for a computer processor?

Answer 12

CPU - Central Processing Unit

Question 13

What are the three important parts of a CPU?

Answer 13

Control unit
Arithmetic and Logic Unit (ALU)
Clock

Question 14

What is the control unit?

Answer 14

The control unit manages other components and the processing cycle of the CPU.

Question 15

Describe the function of the control unit?

Answer 15

-When an instruction arrives at the CPU, it goes to the control unit.
-The control unit works out what the instruction means.
-The control unit makes sure that the other parts of the CPU do the work needed to carry out the instruction.

Question 16

What is the ALU?

Answer 16

The Arithmetic and Logic Unit (ALU) is the component part of the CPU that performs all arithmetic and logical operations and calculations.

Question 17

Describe the function of the ALU.

Answer 17

-The control unit sends instructions to the ALU
-The ALU carries out the instructions.

Question 18

What is the clock?

Answer 18

A small quartz crystal in the CPU that emits a regular pulse.

Question 19

What is the clock’s function?

Answer 19

The pulse of the clock is used to synchronize the CPU’s processing cycle. Every time the CPU clock ticks , the control unit sends an instruction to the ALU.

Question 20

How many times does a CPU’s clock tick every second?

Answer 20

The clock in the CPU of your computer ticks around 3 billion times every second.

Question 21

What are buses?

Answer 21

Are high speed data links that carry instructions and data to and from the CPU.

Question 22

How are the three parts of the CPU joined together?

Answer 22

The three parts of a CPU are joined together by connections called buses

Question 23

How does a CPU complete its tasks?

Answer 23

Even simple tasks have to be broken down into several smaller tasks before the CPU can complete it.

Question 24

What makes a CPU seem so powerful?

Answer 24

It can do a task every time it’s clock ticks. A computer can appear to do amazing things by doing a lot of very simple tasks , very quickly.