ITPEC FE Morning October 2023 Question 11
ITPEC FE Morning October 2023 — Question 11 of 80
Program Counter (PC) — a special CPU register that holds the address of the next instruction to be fetched.
Key CPU registers:
- Program Counter (PC) — address of the next instruction to fetch
- Instruction Register (IR) — holds the current instruction being executed
- Accumulator (ACC) — stores arithmetic/logic operation results
- Index Register — used for address calculation (base + offset)
Why not others:
- (a) Accumulator — stores ALU results, not addresses
- (b) Index register — used for offset-based addressing in arrays
- (c) Instruction register — holds the current instruction, not the next address
Key rule: PC points to where to fetch next; IR holds what was already fetched.
AI-generated — may contain errors
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