Dropbox

Check If It Is a Good Array

Design a File Backup System

Also asked at Apple, Meta +1

Design an Asynchronous Media Processing Pipeline

Also asked at Pinterest

Design File Deduplication

Design Hit Counter

Also asked at Affirm, Apple +1

Design Offline Sync and Conflict Resolution

Also asked at Chime, PayPal +1

Find Duplicate File in System

Game of Life

Also asked at Two Sigma

Grid Illumination

Guess the Word

Letter Combinations of a Phone Number

Also asked at Chime, LinkedIn +1

Median of Two Sorted Arrays

Also asked at Amazon, Google +2

Minimize Malware Spread II

Number of Valid Words for Each Puzzle

Seat Reservation Manager

Two Sum

Also asked at Airbnb, Amazon +5

Web Crawler

Also asked at Anthropic

Web Crawler Multithreaded

Also asked at MongoDB

Word Break II

Word Pattern

Word Pattern II