Question

After a CPU decodes an instruction, what is the next step in the execution cycle?

Answer 1

Answer: E) The CPU executes the instruction by performing ALU operations.

Explanation: The execution cycle is of three stages namely; fetch, decode and execute. These are the functions that the CPU carries out from the time of boot-up up until it's shut down.

At the fetch stage, the computer retrieves program instructions from its memory register, at the decode stage; the decoders interprets the instructions from the instructions register and then the next stage will be the executions, at this stage; the interpreted instructions are then passed to relevant function units of the CPU to carry out the required instructions.

E.g mathematical and logic functions are passed on the ARITHMETIC AND LOGIC UNIT(ALU) to perform.