completed the interview problem

[anilkumarm0921-oss]

No description provided.

[super30admin]

Strengths:

• Correct implementation of binary search to find the missing number.
• Good variable naming and code structure.
• Proper handling of edge cases through the binary search conditions.

Areas for Improvement:

• Add the missing import statement: import java.util.Arrays;.
• The problem description mentions the array is already sorted, so the sorting step is unnecessary and should be removed to maintain O(log n) time complexity.
• Consider adding comments to explain the logic, especially the condition arr[mid] == mid + 1.
• The method name missingNum could be more descriptive, like findMissingNumber.