explain the fetch execute cycle.?

Answer 1

I recall being encouraged to imagine a Postman on a Skateboard in an immensely large Multi-storey building with linked balconies.

He has to 'Visit' each 'address' as instructed and return to 'Base' so that the instruction or data can be acted on.

Thus reminding me of ' "Fetch" and "Execute" '

This pictorial image still serves me well over 25 years later.

Answer 2

Relating to Computer Processors ..

'Fetch' means get an instruction from memory, 'Execute' means process that instruction. Part of the processing would involve calculating which instruction to Fetch next.

When the power is first turned on, the CPU chip will Fetch it's first instruction from some hard-wired location (for example, the Memory at address '0').

CPU chips are vastly more complicated that that, however this is the basic operation.

Answer 3

there are three parts to the CPU
- main memory where the program and data is stored in binary form (machine code)
-ALU arithmetic logic unit where all the adding, comparing is done (full of logic circuits)
-control unit for(among other things) timing the movement of data around the CPU

An instruction is fetched from main memory and put into ALU where the logic circuits decode what it means, and then it is performed(executed)


This sometimes called fetch/execute cycle too.
http://searchsqlserver.techtarget.com/sDefinition/0,,sid87_gci214578,00.html

Hope this helps

Answer 4

I'll go with whatever Steve B says, the man is an obvious genius....I was going to say fetch me the bike and I'll ride it.