This is LeetCode's official curated list of Top classic interview questions to help you land your dream job.
Just like any other skills, coding interview is one area where you can greatly improve with deliberate practice.
Most of the classic interview questions have multiple solution approaches. For the best practice result, we strongly advise you to go through this list at least a second time, or even better - a third time.
By the second attempt, you may discover some new tricks or new methods. By the third time, you should find that your code appear to be more concise compared to your first attempt. If so, congratulations!
Remember: Deliberate practice does not mean looking for answers and memorizing it. You won't go very far with that approach. The more you are able to solve a problem yourself without any reference to answers, the more you will improve.
- Remove Duplicates from Sorted Array
- Best Time to Buy and Sell Stock II
- Rotate Array
- Contains Duplicate
- Single Number
- Intersection of Two Arrays II
- Plus One
- Move Zeroes
- Two Sum
- Valid Sudoku
- Rotate Image
- Reverse String
- Reverse Integer
- First Unique Character in a String
- Valid Anagram
- Valid Palindrome
- String to Integer (atoi)
- Implement strStr()
- Longest Common Prefix
- Delete Node in a Linked List
- Remove Nth Node From End of List
- Reverse Linked List
- Merge-Two-Sorted-Lists
- Palindrome-Linked-List
- Linked List Cycle