Amazon

3Sum

Also asked at Google, Microsoft

Add Two Numbers

Also asked at Airbnb, Google +1

Best Time to Buy and Sell Stock

Also asked at Apple, Google +3

Container With Most Water

Also asked at Google

Course Schedule

Also asked at Apple, TikTok

Design a Distributed Message Queue

Also asked at Apple, Confluent

Design a Fitness Tracking Application

Design a Log Ingestion and Search System

Also asked at Google, Microsoft

Design a Rate Limiter with Variable User Quotas

Also asked at Atlassian, Google +2

Design a URL Shortener

Also asked at Google, Meta +3

Design a Video Streaming Service

Design DoorDash

Also asked at DoorDash, Microsoft

Design Fleet Firmware and Machine Updates

Also asked at Google, Microsoft

Design Instagram

Also asked at DoorDash, Meta +1

Design Parking Garage Reservations and Payments

Also asked at Google

Design Search Typeahead

Also asked at Apple, LinkedIn +4

Distributed File System

Also asked at Databricks, Google +1

Fraud Detection System

ML System Design · Also asked at DoorDash, Microsoft +4

Group Anagrams

Also asked at Affirm, Apple +2

Koko Eating Bananas

Also asked at DoorDash

Longest Palindromic Substring

Also asked at Google, Microsoft

Lowest Common Ancestor of a Binary Tree

Also asked at Atlassian, MongoDB +1

LRU Cache

Also asked at Apple, Citadel +8

Median of Two Sorted Arrays

Also asked at Dropbox, Google +2

Merge Intervals

Also asked at Apple, Atlassian +9

Merge K Sorted Lists

Also asked at Apple, Meta +5

Number of Islands

Also asked at Apple, LinkedIn +6

Recommendation / Ranking System

ML System Design · Also asked at Airbnb, Atlassian +4

Rotting Oranges

Also asked at Uber

Search in Rotated Sorted Array

Also asked at LinkedIn, MongoDB +1

Subarray Sum Equals K

Also asked at Apple, Google +1