Amazon DS & Algo Round Interview Questions

This list contains commonly asked DSA questions in Amazon for SDE roles, including SDET and intern positions. It also includes questions from Bar Raiser rounds.

If you have Amazon interviews already scheduled, then this list is for you. Use it for final preparation of your DSA interview.

Idea is to solve Amazon tagged questions at least 2–3 times, rather than solving a lot of new questions just once.

Doing questions multiple times will help you understand the patterns and when you see a question which is rephrased differently but has same solution, you will be able to do it.

Questions which you can directly find on LeetCode (free ones)

• Sliding Window Maximum: https://leetcode.com/problems/sliding-window-maximum/description/
• Course Schedule: https://leetcode.com/problems/course-schedule/description/
• Course Schedule II: https://leetcode.com/problems/course-schedule-ii/description/
• Design Browser History: https://leetcode.com/problems/design-browser-history/description/
• House Robber: https://leetcode.com/problems/house-robber/description/
• House Robber II: https://leetcode.com/problems/house-robber-ii/description/
• Similar String Groups: https://leetcode.com/problems/similar-string-groups/description/
• Reverse Nodes in k-Group: https://leetcode.com/problems/reverse-nodes-in-k-group/
• Insert Delete GetRandom O(1): https://leetcode.com/problems/insert-delete-getrandom-o1/description/
• Number of Islands: https://leetcode.com/problems/number-of-islands/
• Longest Substring Without Repeating Characters: https://leetcode.com/problems/longest-substring-without-repeating-characters/description/
• Serialize and Deserialize Binary Tree: https://leetcode.com/problems/serialize-and-deserialize-binary-tree/description/
• Valid Parentheses: https://leetcode.com/problems/valid-parentheses/description/
• Remove Invalid Parentheses: https://leetcode.com/problems/remove-invalid-parentheses/description/
• Jump Game: https://leetcode.com/problems/jump-game/description/
• Jump Game II: https://leetcode.com/problems/jump-game-ii/description/
• Search in Rotated Sorted Array: https://leetcode.com/problems/search-in-rotated-sorted-array/
• Maximum Sum Circular Subarray: https://leetcode.com/problems/maximum-sum-circular-subarray/description/
• Maximum Good Subarray Sum: https://leetcode.com/problems/maximum-good-subarray-sum/description/
• Lowest Common Ancestor of a Binary Tree: https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/
• Max Area of Island: https://leetcode.com/problems/max-area-of-island/description/
• Island Perimeter: https://leetcode.com/problems/island-perimeter/description/
• Minimum Number of Arrows to Burst Balloons: https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/description/
• Balance a Binary Search Tree: https://leetcode.com/problems/balance-a-binary-search-tree/description/
• First Missing Positive: https://leetcode.com/problems/first-missing-positive/description/
• Top K Frequent Elements: https://leetcode.com/problems/top-k-frequent-elements/
• Remove K Digits: https://leetcode.com/problems/remove-k-digits/
• Delete and Earn: https://leetcode.com/problems/delete-and-earn/description/
• Cheapest Flights Within K Stops: https://leetcode.com/problems/cheapest-flights-within-k-stops/description/
• Rotting Oranges: https://leetcode.com/problems/rotting-oranges/description/
• Search a 2D Matrix II: https://leetcode.com/problems/search-a-2d-matrix-ii/description/
• Boundary of Binary Tree: https://leetcode.com/problems/boundary-of-binary-tree/description/
• Separate Squares I: https://leetcode.com/problems/separate-squares-i/description/
• Separate Squares II: https://leetcode.com/problems/separate-squares-ii/description/
• Car Pooling: https://leetcode.com/problems/car-pooling/description/
• Longest Palindromic Substring: https://leetcode.com/problems/longest-palindromic-substring/description/
• Boats to Save People: https://leetcode.com/problems/boats-to-save-people/description/
• Detonate the Maximum Bombs: https://leetcode.com/problems/detonate-the-maximum-bombs/description/