Coding interview questions

Amazon Medium Coding Interview Questions (DSA)

The 30 medium DSA problems Amazon has asked most in the last six months, most-asked first. Switch tabs to see the rest of the 50. Tick them off as you go.

Practice a Amazon interview with me

I'm Alex. I'll pick 2 problems from Amazon's list at your level and interview you like a real Amazon round.

30medium problems
30full breakdowns
50Amazon problems in all

By difficulty: All (50) · Easy (13) · Medium (30) · Hard (7)

Start Amazon Mock Interview→

Topics

3.Longest Substring Without Repeating Characters
Full breakdownHash TableStringSliding Window
Medium+13▶ Mock
146.LRU Cache
Full breakdownHash TableLinked ListDesign
Medium+9▶ Mock
200.Number of Islands
Full breakdownArrayDepth-First SearchBreadth-First Search
Medium+7▶ Mock
875.Koko Eating Bananas
Full breakdownArrayBinary Search
Medium▶ Mock
11.Container With Most Water
Full breakdownArrayTwo PointersGreedy
Medium+6▶ Mock
56.Merge Intervals
Full breakdownArraySortingQuicksort
Medium+14▶ Mock
2.Add Two Numbers
Full breakdownLinked ListMathRecursion
Medium+3▶ Mock
207.Course Schedule
Full breakdownDepth-First SearchBreadth-First SearchGraph Theory
Medium+4▶ Mock
138.Copy List with Random Pointer
Full breakdownHash TableLinked List
Medium+1▶ Mock
15.3Sum
Full breakdownArrayTwo PointersSorting
Medium+5▶ Mock
75.Sort Colors
Full breakdownArrayTwo PointersSorting
Medium▶ Mock
5.Longest Palindromic Substring
Full breakdownTwo PointersStringDynamic Programming
Medium+8▶ Mock
3413.Maximum Coins From K Consecutive Bags
Full breakdownArrayBinary SearchGreedy
Medium▶ Mock
904.Fruit Into Baskets
Full breakdownArrayHash TableSliding Window
Medium▶ Mock
49.Group Anagrams
Full breakdownArrayHash TableString
Medium+9▶ Mock
53.Maximum Subarray
Full breakdownArrayDivide and ConquerDynamic Programming
Medium+7▶ Mock
78.Subsets
Full breakdownArrayBacktrackingBit Manipulation
Medium▶ Mock
347.Top K Frequent Elements
Full breakdownArrayHash TableDivide and Conquer
Medium+6▶ Mock
7.Reverse Integer
Full breakdownMath
Medium▶ Mock
1011.Capacity To Ship Packages Within D Days
Full breakdownArrayBinary Search
Medium▶ Mock
994.Rotting Oranges
Full breakdownArrayBreadth-First SearchMatrix
Medium+5▶ Mock
253.Meeting Rooms II
Full breakdownArrayTwo PointersGreedy
Medium+6▶ Mock
337.House Robber III
Full breakdownDynamic ProgrammingTreeDepth-First Search
Medium▶ Mock
167.Two Sum II - Input Array Is Sorted
Full breakdownArrayTwo PointersBinary Search
Medium▶ Mock
767.Reorganize String
Full breakdownHash TableStringGreedy
Medium▶ Mock
153.Find Minimum in Rotated Sorted Array
Full breakdownArrayBinary Search
Medium▶ Mock
735.Asteroid Collision
Full breakdownArrayStackSimulation
Medium+1▶ Mock
128.Longest Consecutive Sequence
Full breakdownArrayHash TableUnion-Find
Medium+3▶ Mock
621.Task Scheduler
Full breakdownArrayHash TableGreedy
Medium+2▶ Mock

Frequently Asked Questions

What medium Amazon coding questions are most common?

InterviewSkool has 30 medium Amazon coding questions. Focus on the top 10 to 15 most common problems for the best ROI.

How many medium questions does Amazon have?

Amazon has 30 medium coding questions out of 50 total. Most interviews focus on Medium problems, so this is the most important difficulty to prepare for.

Are these Amazon medium questions free?

Yes. All 30 medium Amazon coding questions are free to browse. No sign-up required. Filter by topic and click any problem to open it on LeetCode.

Practice with a Mock Interview

Simulate real Amazon interview pressure with our AI interviewer.

Start Mock Interview →