The CPU Flashcards
1
Q
What does ‘CPU’ stand for?
A
Central Processing Unit
2
Q
What are the three main parts of the CPU?
A
- Control Unit (CU)
- Arithmetic Logic Unit (ALU)
- Cache
3
Q
What is the role of the Control Unit?
A
To execute program instructions by following the fetch-decode-execute cycle
4
Q
What register does the CU contain?
A
Program Counter
5
Q
What is the role of the ALU?
A
To carry out all of the calculations and logic gates
6
Q
What register does the ALU contain?
A
Accumulator
7
Q
What is the role of the cache?
A
It is very fast memory, so it stores regularly used data to speed up the time it takes to fetch this (in comparison to RAM).
8
Q
Name two other registers:
A
- Memory Address Register
- Memory Data Register
9
Q
What is, overall, the main function of the CPU?
A
To carry out the fetch-decode-execute cycle, billions of times per second.
