Open In App

UGC-NET | UGC NET CS 2016 Aug – II | Question 33

Like Article
Like
Save
Share
Report

In compiler optimization, operator strength reduction uses mathematical identities to replace slow math operations with faster operations. Which of the following code replacements is an illustration of operator strength reduction ?
(A) Replace P + P by 2 * P or Replace 3 + 4 by 7.
(B) Replace P * 32 by P < < 5
(C) Replace P * 0 by 0
(D) Replace (P < <4) – P by P * 15

Answer: (B)

Explanation: In option (B), Multiplication operation is replaced with Shift Operator . It reduce the operator strength because shift operator is less expensive than multiplication operation.

So option (B) is correct.

Quiz of this Question


Last Updated : 06 Feb, 2020
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads