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What is the output of isPowerOfTwo(0) using the following code?

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Bit Manipulation - Power of Two
What is the output of isPowerOfTwo(0) using the following code?
ATrue
BNone
CError
DFalse
Step-by-Step Solution
Solution:

  1. Step 1: Check input 0

    Since n = 0, the condition n <= 0 is True, so function returns False immediately.

  2. Step 2: Confirm output

    Function returns False, so print outputs False, no error occurs.

  3. Final Answer:

    Option D -> Option D

  4. Quick Check:

    Zero is not a power of two, so output is False [OK]
Quick Trick: Zero is not power of two, returns False [OK]
Common Mistakes:
MISTAKES
  • Assuming zero is power of two
  • Confusing zero with one
Trap Explanation:
PITFALL
  • Some candidates think zero passes the bitwise check, but code handles zero explicitly.
Interviewer Note:
CONTEXT
  • Tests handling of edge cases like zero input.
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