Netflix

Contains Duplicate

Contains Duplicate II

Also asked at Airbnb

Contains Duplicate III

Count Disjoint String Pairs

Countdown Latch

Design a File Backup System

Also asked at Apple, Dropbox +1

Design a Global Config Deployment System

Design a WAL Log Enrichment Pipeline

Design an Ad Event Aggregator

Also asked at Apple, Meta +2

Design an Ads Audience Targeting System

Design an Ads Frequency Cap System

Design the Data Model for a Promotion Posting System

Design the Data Model for an Ads Demand Platform

Error Rate Monitor

First Missing Positive

Homepage Billboard Rotation

Homepage Title Deduplication

Problem Solving

Latency Tracker Percentile

Meeting Rooms

Also asked at Uber

Merge Intervals

Also asked at Amazon, Apple +9

ML Job Scheduler

ML System Design

Movie History Friends

Movie History Friends II

Multi-thread Atomic Counter

Music Playlist

Nested Map Path Query (JSON Parser)

Netflix Sentiment Tracking

ML System Design

Number Pairs That Match Target

Parallel Courses

Parallel Courses II

Reconstruct Itinerary

Also asked at Pinterest

Sort by User Preference

Problem Solving

Spam Email Detection

Problem Solving

String to Integer (atoi)

Tagged Command Undo

Timer Function

User Engagement Patterns

Versioned File System

Video Recommendation

ML System Design · Also asked at Reddit

Weighted LRU Cache

Also asked at xAI