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GATE | Quiz for Sudo GATE 2021 | Question 33

  • Last Updated : 17 Dec, 2020

An instruction is stored at location 300 with its address field at location 301. The address field has the value 400. A processor register R1 contains the number 200. Which of the following effective address is/are correct for addressing modes of the instruction?

Note – This question is multiple select questions (MSQ).
(A) Direct effective address = 400
(B) Register indirect effective address = 200
(C) PC‐Relative effective address = 700
(D) Register indirect effective address = 600


Answer: (A) (B) (D)

Explanation: Effective address,

a. Direct = 400
b. Immediate = 301
c. Relative = 302 + 400 = 702
d. Reg. Indirect = 200
e. Indexed = 200 + 400 = 600 

So, option (C) is false.

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