Before trying these, try the intemediate algorithm questions first.
- Two Sum - Find indices of the two numbers such that they add up to a specific target
- Longest substring without repeating characters
- 3sum - Find all unique triplets in the array which gives the sum of zero
- Explanation for 3sum and the two pointer technique
- Longest Palindromic Substring
- Leetcode Top Interview Questions
- Leetcode Mock Interview
- Hackerrank Interview Preparation Kit