Amazon

The most frequently asked Amazon interview problems — top 60 by LeetCode tag frequency (June 2025) plus 5 high-occurrence classics (2022 cross-reference), grouped by pattern. All 65 problems written.

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Arrays & Hashing

Two Sum↻Easy
Group Anagrams↻Medium
Top K Frequent Elements↻Medium
Longest Consecutive Sequence↻Medium
Product of Array Except Self↻Medium
Contains Duplicate↻Easy
Majority Element↻Easy
Maximum Product of Three Numbers↻Easy
Rotate Array↻Medium
Analyze User Website Visit Pattern↻Medium

Two Pointers

Trapping Rain Water↻Hard
Container With Most Water↻Medium
3Sum↻Medium
Two Sum II Input Array Is Sorted↻Medium
Remove Duplicates from Sorted Array↻Easy
Merge Sorted Array↻Easy
Move Zeroes↻Easy

Sliding Window

Longest Substring Without Repeating Characters↻Medium
Best Time to Buy and Sell Stock↻Easy
Minimum Window Substring↻Hard
Sliding Window Maximum↻Hard
Fruit Into Baskets↻Medium
Find the Index of the First Occurrence in a String↻Easy
Maximum Coins From K Consecutive Bags↻Medium
Maximum Average Subarray I↻Easy

Stack

Valid Parentheses↻Easy
Asteroid Collision↻Medium

Binary Search

Linked List

Trees

Lowest Common Ancestor of a Binary Tree↻Medium
House Robber III↻Medium

Heap / Priority Queue

Backtracking

Letter Combinations of a Phone Number↻Medium
Subsets↻Medium
Permutations↻Medium
Word Search↻Medium

Graphs

1-D DP

Longest Palindromic Substring↻Medium
Climbing Stairs↻Easy

2-D DP

Predict the Winner↻Medium

Greedy

Maximum Subarray↻Medium
Minimum Operations to Make Array Non-Decreasing↻Medium

Intervals

Merge Intervals↻Medium
Meeting Rooms II↻Medium

Math & Geometry

Add Binary↻Easy
Palindrome Number↻Easy

Strings

Bit Manipulation

Reverse Integer↻Medium