Which of the following expression is correct to check if a given number N is a power of 2 or not? (A) N && (N – 1) (B) N || (N – 1) (C) N ^ (N – 1) (D) N & (N – 1) Answer: (D) Explanation: If N & (N – 1) gives 0, then the given number is a power of 2 otherwise not.Quiz of this Question