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What is the correct sequence of operations when a computer executes a program?

easy📝 Factual Q3 of Q15
Intro to Computing - How Hardware Works
What is the correct sequence of operations when a computer executes a program?
AFetch instruction, decode instruction, execute instruction, store result
BExecute instruction, fetch instruction, decode instruction, store result
CDecode instruction, fetch instruction, execute instruction, store result
DStore result, fetch instruction, decode instruction, execute instruction
Step-by-Step Solution
Solution:

  1. Step 1: Fetch instruction

    The CPU retrieves the next instruction from memory.

  2. Step 2: Decode instruction

    The CPU interprets what the instruction means.

  3. Step 3: Execute instruction

    The CPU performs the operation specified.

  4. Step 4: Store result

    The CPU writes back any results to memory or registers.

  5. Final Answer:

    Fetch instruction, decode instruction, execute instruction, store result -> Option A

  6. Quick Check:

    Instruction cycle order is fetch -> decode -> execute -> store [OK]
Quick Trick: Instruction cycle: fetch, decode, execute, store [OK]
Common Mistakes:
MISTAKES
  • Mixing up the order of decode and fetch
  • Assuming execution happens before decoding

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