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SPIQ #5 - Write one line of code to check if X is a power of 2

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Published on Mar 25, 2014

If your interviewer fancies themself as hard core or if you're applying for a systems programming job then you might be asked to twiddle bits at the interview.

Here is one of the more common bit twiddling hacks - test if an integer X is a power of 2 (meaning "is X equal to some number raised to the power of 2")

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