Computing - CPU

Question 1

What does the control unit do?

Answer 1

Uses electrical signals to direct the system to execute instructions in stored programs

Question 2

What 3 things does the ALU do?

Answer 2

Addition
Subtraction
Comparisons

Question 3

What is the cycle that the CPU continuously completes?

Answer 3

Fetch-execute cycle

Question 4

Explain the fetch-execute cycle

Answer 4

CPU fetches next instruction
Decodes it into a language it understands
Executes it before repeating the process again

Question 5

What happens immediately after the computer being switched on? (3 steps)

Answer 5

CPU executes the boot program from ROM
The boot program starts up the operating system
After initial boot process, operating system gets control

Question 6

Give 2 factors that affect the speed of the CPU

Answer 6

Clock speed

Number of cores

Question 7

How does data travel around a computer?

Answer 7

Data bus

Question 8

How is data stored near the CPU?

Answer 8

In cache memory

Question 9

What are the 2 main components of the CPU?

Answer 9

Control unit

ALU