Bit Manipulation - Bitwise AND of Numbers Range
What is the output of the optimal bitwise AND range function for input left=0, right=0?
What is the output of the optimal bitwise AND range function for input left=0, right=0?
medium🧾 Code Trace Q4 of Q15
Step-by-Step Solution
Solution:
Step 1: Check loop condition with left=0, right=0
Since right is not greater than left, loop does not execute.Step 2: Return right which is 0
Output is 0 as expected for single element range.Final Answer:
Option A -> Option AQuick Check:
Single number AND with itself is the number [OK]
Quick Trick: Loop skips if left == right [OK]
Common Mistakes:
MISTAKES- Assuming loop runs even if left == right
- Returning wrong default value
Trap Explanation:
PITFALL- Candidates sometimes expect loop to run or error on single-element range, but it does not.
Interviewer Note:
CONTEXT- Tests handling of edge cases in bitwise AND range code.
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