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.

Arrays & Hashing

Two SumEasy
Group AnagramsMedium
Top K Frequent ElementsMedium
Longest Consecutive SequenceMedium
Product of Array Except SelfMedium
Contains DuplicateEasy
Majority ElementEasy
Maximum Product of Three NumbersEasy
Rotate ArrayMedium
Analyze User Website Visit PatternMedium

Two Pointers

Sliding Window

Longest Substring Without Repeating CharactersMedium
Best Time to Buy and Sell StockEasy
Minimum Window SubstringHard
Sliding Window MaximumHard
Fruit Into BasketsMedium
Find the Index of the First Occurrence in a StringEasy
Maximum Coins From K Consecutive BagsMedium
Maximum Average Subarray IEasy

Stack

Valid ParenthesesEasy
Asteroid CollisionMedium

Binary Search

Linked List

Trees

Lowest Common Ancestor of a Binary TreeMedium
House Robber IIIMedium

Heap / Priority Queue

Backtracking

Letter Combinations of a Phone NumberMedium
SubsetsMedium
PermutationsMedium
Word SearchMedium

Graphs

1-D DP

Longest Palindromic SubstringMedium
Climbing StairsEasy

2-D DP

Predict the WinnerMedium

Greedy

Maximum SubarrayMedium
Minimum Operations to Make Array Non-DecreasingMedium

Intervals

Merge IntervalsMedium
Meeting Rooms IIMedium

Math & Geometry

Add BinaryEasy
Palindrome NumberEasy

Strings

Bit Manipulation

Reverse IntegerMedium