Exam-style question
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What is the main role of the program counter (PC) during the Fetch-Execute cycle?.
- A.It stores the instruction currently being decoded
- B.It stores the address of the next instruction to be fetched
- C.It stores data being transferred to an output device
- D.It stores the result of every arithmetic operation
Model answer
What a good answer should say
- It stores the address of the next instruction to be fetched
Explanation
Why this works
The program counter holds the address of the next instruction. It is updated so that instructions can be fetched in the correct order, unless the sequence is changed by a control-flow instruction.
Common mistake
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