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UGC-NET | UGC NET CS 2015 Dec – II | Question 41

Loop unrolling is a code optimization technique:
(A) that avoids tests at every iteration of the loop.
(B) that improves performance by decreasing the number of instructions in a basic block.
(C) that exchanges inner loops with outer loops
(D) that reorders operations to allow multiple computations to happen in parallel

Answer: (A)
Explanation: Loop unrolling is a code optimization technique that avoids tests at every iteration of the loop. It does not improves performance by decreasing the number of instructions in a basic block. Neither it exchanges inner loops with outer loops nor it reorders operations to allow multiple computations to happen in parallel.
So, option (A) is correct.

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