Bridgenext Interview Questions, Process, and Tips

Identify the duplicate number in an array using efficient algorithms.

• Use a hash set to track seen numbers. Example: For [1, 2, 3, 2], add 1, 2, and when 2 is seen again, it's the duplicate.

• Sort the array first, then check adjacent elements. Example: In [3, 1, 2, 3], sorting gives [1, 2, 3, 3].

• Use the Floyd's Tortoise and Hare algorithm for O(n) time and O(1) space. Example: For [1, 3, 4, 2, 2], find the cycle.

• If the ar...read more

A palindrome is a string that reads the same forwards and backwards. Check by comparing characters from both ends.

• 1. Initialize two pointers: one at the start and one at the end of the string.

• 2. Compare the characters at both pointers. If they are not the same, it's not a palindrome.

• 3. Move the left pointer right and the right pointer left, and repeat the comparison.

• 4. If all characters match, the string is a palindrom...read more