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Consider the following sequence of micro–operations 

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Consider the following sequence of micro–operations 

MBR ← PC 

MAR ← X

 PC ← Y 

Memory ← MBR 

Which one of the following is a possible operation performed by this sequence?

(A) Instruction fetch

(B) Operand fetch

(C) Conditional branch

(D) Initiation of interrupt service

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(D) Initiation of interrupt service

PC content is stored in memory via MBR and PC gets new address from Y. It represents a function call (routine), which is matching with interrupt service initiation

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