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Fetch Execute Cycle. The fetch execute cycle is the basic operation (instruction) cycle of a computer (also known as the fetch decode execute cycle).
It is essentially a process that the CPU repeats continuously in order to execute instructions. To complete each cycle, the CPU goes through three main stages.
1-Fetches a program instruction from the main memory
2-Decodes the instruction, i.e. works out what needs to be done
3-Executes, i.e. carries out, the instruction