Which of these expressions will return true if the input integer a is

1.	Which of these expressions will return true if the input integer a is a power of two?
A.	(~a & (a 1)) == 0;
B.	(a \| (a 1)) == 0;
C.	(a & (a 1)) == 0;
D.	(a \| (a + 1)) == 0;
E.	None of these
Answer» D. (a \| (a + 1)) == 0;

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Which of these expressions will return true if the input integer a is a power of two?

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