Fetch-execute cycle

Question 1

What part of the CPU follows the fetch-execute cycle?

Answer 1

The control unit

Question 2

First step of the fetch-execute cycle?

Answer 2

Copy memory address from the program counter to the MAR

Question 3

Second step of the fetch-execute cycle?

Answer 3

Copy the instruction stored in the MAR to the MDR

Question 4

Third step of the fetch-execute cycle?

Answer 4

Increment the program counter to point in the address of the next instruction ready for the next cycle

Question 5

What happens in the decoding part of the fetch-execute cycle?

Answer 5

The instruction in the MDR is decoded by the CU
The CU may then prepare for the next step like loading values into the MAR and MDR

Question 6

What happens in the execution part of the fetch-execute cycle?

Answer 6

The instruction is preformed