Google

3Sum

Also asked at Amazon, Microsoft

Concatenation of Array

Container With Most Water

Also asked at Amazon

Design a Distributed KV Store

Also asked at Microsoft, SoFi +2

Design a Log Ingestion and Search System

Also asked at Amazon, Microsoft

Design a Rate Limiter with Variable User Quotas

Also asked at Amazon, Atlassian +2

Design a URL Shortener

Also asked at Amazon, Meta +3

Design a Visual Landmark Recognition Service

Design a Web Crawler

Also asked at Atlassian, Meta

Design an Enterprise AI Agent with Internal Tool Access

Also asked at Apple

Design an IP Reputation and Blocking Service

Design an Online Coding Judge Platform

Design Distributed Metrics System

Also asked at Apple, LinkedIn +1

Design Fleet Firmware and Machine Updates

Also asked at Amazon, Microsoft

Design Next-Word Prediction for a Mobile Keyboard

Also asked at Meta

Design Parking Garage Reservations and Payments

Also asked at Amazon

Design TikTok

Also asked at Meta

Distributed File System

Also asked at Amazon, Databricks +1

Longest Common Prefix

Also asked at Apple, Jane Street +1

Longest Consecutive Sequence

Also asked at NVIDIA

Longest Palindromic Substring

Also asked at Amazon, Microsoft

Longest Substring Without Repeating Characters

Also asked at Amazon, Microsoft +3

Majority Element

Also asked at Microsoft

Maximum Subarray

Also asked at LinkedIn, Microsoft

Median of Two Sorted Arrays

Also asked at Amazon, Dropbox +2

Merge Intervals

Also asked at Amazon, Apple +9

Palindrome Number

Also asked at Microsoft

Reverse Integer

Also asked at Apple

Roman to Integer

Subarray Sum Equals K

Also asked at Amazon, Apple +1

Trapping Rain Water

Also asked at Airbnb, Amazon +3

Valid Parentheses

Also asked at LinkedIn, Meta +3