fetch-decode-execute cycle

Question 1

what happens in the fetch part

Answer 1

instruction gets recieved from memory address in the RAM then RAM finds the instructions stored at the address, fetches it and passes it back to the CPU.

Question 2

what happens in the decode part

Answer 2

the CPU breaks down the instructions into something it can understand. The CPU identifies the operation code (op-code).

Question 3

what is the execute step

Answer 3

the instruction in the op code is carried out using the data that is fetched. this data can then be used by future instructions or be passed back to the main memory

Question 4

how many time can the fetch-execute cycle be carried out

Answer 4

several thousand million times in one second

Question 5

what are the 3 units that make von neumann achitectures

Answer 5

control unit. arithmetic logic unit. memory unit.

Question 6

what does the cu do

3 different ones

Answer 6

1has data to be inputted, outputted or stored
2interprets instructions
3manages the computers response

Question 7

what does the arithmetic logic do

3 different ones
A, L, C

Answer 7

preforms: arithmetic calculations
logic operations
and comparisons