3.4.5 AQA Fetch-Execute Cycle

What is the main purpose of the fetch stage in the fetch-execute cycle?

• To identify the operation to be carried out

• To fetch the next instruction to the CPU from main memory

• To execute the instruction

• To write data back to the main memory

What happens during the Decode stage of the fetch-execute cycle?

• Data is written back to the main memory

• The instruction is carried out

• The operation to be carried out is identified

• The next instruction is fetched to the CPU

During the fetch stage, the next instruction is fetched to the ______________ from main memory;

In which stage of the fetch-execute cycle is the instruction actually carried out?

• Execute stage

• Decode stage

• Write stage

• Fetch stage

The next instruction is _________ to the processor from the main memory;

What may be required during the Execute stage of the fetch-execute cycle?

• To fetch the next instruction to the CPU from main memory

• To identify the operation to be carried out

• To write data back to the main memory

• To read data from the main memory

Data used by the instruction to be ________ may be in the main memory;

Where are program instructions for current programs stored during the fetch-execute cycle?

• Secondary memory

• Main memory

• Register memory

• Cache memory

During the decode stage, the __________ (or instruction) to be carried out is identified.

What is fetched from the main memory during the fetch stage of the fetch-execute cycle?

• Data for the next instruction

• The current instruction

• Results of calculations

• Data for the previous instruction