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The algorithm followed in most of the systems to perform out of order execution is __________

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The algorithm followed in most of the systems to perform out of order execution is __________

(a) Tomasulo algorithm

(b) Score carding

(c) Reader-writer algorithm

(d) None of the mentioned

This question was addressed to me by my school principal while I was bunking the class.

I'd like to ask this question from Hazards of Processor  Architecture in division Pipelining of Computer Architecture

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The correct answer is (a) Tomasulo algorithm

The explanation is: The Tomasulo algorithm is a hardware algorithm developed in 1967 by Robert Tomasulo from IBM. It allows sequential instructions that would normally be stalled due to certain dependencies to execute non-sequentially (out-of-order execution).

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