#Arrays

How do you find a missing number in an array given overflow constraints? Discuss your approach.

Given an array, find the optimal solution for a brute force O(n²) approach. Can you optimize it to O(n)?

Complete three coding problems within 90 minutes. The topics include arrays, hashmaps, and string manipulation. Two problems are of medium difficulty, and one is hard.

Describe the steps to replace a specific portion of an array with a new value. What approaches would you use to ensure efficiency?

Describe the Dutch National Flag problem and outline the algorithm to sort an array with three distinct values in a single pass.