Algorithms Quiz | Bit Algorithms | Question 4
Consider the following code snippet for checking whether a number is power of 2 or not.
/* Incorrect function to check if x is power of 2*/bool isPowerOfTwo (unsigned int x) { return (!(x&(x-1))); } |
What is wrong with above function?
(A) It does reverse of what is required
(B) It works perfectly fine for all values of x.
(C) It does not work for x = 0
(D) It does not work for x = 1
Answer: (C)
Explanation: Please see https://www.geeksforgeeks.org/program-to-find-whether-a-no-is-power-of-two/
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