ITPEC FE Morning October 2018 Question 11
ITPEC FE Morning October 2018 — Question 11 of 80
Indirect Addressing — the address part points to a memory location that holds the actual address of the data.
How it works (two memory accesses):
- •Instruction contains address
20 - •Memory[20] =
25(this is the effective address) - •Memory[25] = Data (the actual operand)
Why not others:
- (a) Direct addressing — one memory access: address part directly points to data
- (b) Indexed addressing — effective address = address part + index register value
- (d) Relative addressing — effective address = address part + program counter (PC)
Key rule: If the address in the instruction leads to another address (not the data itself), it is indirect addressing. Think of it as a pointer-to-pointer dereference.
AI-generated — may contain errors
The original exam layout is preserved in the image so diagrams, formulas, tables, and code remain accurate.
This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official FE past-paper collection or Report an issue.