What is the Blind 22?
The Blind 22 are the 22 most commonly asked system design interview questions at FAANG companies, collected from real interviews in the past 12 months.
Why the Blind 22?
Real Questions
Not textbook problems. Actual questions asked at Google, Meta, Amazon, Apple, and Netflix.
Recent & Relevant
Updated from interviews in the past 12 months. No outdated questions from 5 years ago.
Company Tagged
Know exactly which companies ask which questions so you can focus your prep.
The 22 Questions
Short URL Service (TinyURL/Bit.ly)
Instagram (Image Sharing, Feed, Stories)
Dropbox / Google Drive (Cloud Storage & Sync)
Twitter (Tweets, Timelines)
YouTube (Video Hosting & Streaming)
Twitter Search (Real-Time Indexing)
Web Crawler
Facebook Newsfeed
Yelp (Reviews + Search)
Uber Backend (Dispatch & Matching)
Ticketmaster (Seat Reservations)
Booking System (Inventory + Reservations)
Distributed Key-Value Store (DynamoDB/Bigtable)
Distributed Queue (Kafka/RabbitMQ)
Job Scheduler (Distributed Cron)
Google Analytics (Clickstream + Dashboard)
Distributed Logging & Monitoring
Trending Hashtags / Top-K
Facebook Likes (Distributed Counter)
Live Comments (FB Live / YouTube Live)
Global Notification Service
API Rate Limiter
Frequently Asked Questions
What is the Blind 22?
The Blind 22 are the 22 most commonly asked system design interview questions at FAANG companies (Google, Meta, Amazon, Apple, Netflix). These questions are collected from real interviews conducted in the past 12 months.
Why are they called the Blind 22?
The name comes from the Blind community (teamblind.com), where engineers anonymously share interview experiences. These 22 questions emerged as the most frequently mentioned system design problems across FAANG interviews.
How often are the Blind 22 questions updated?
The questions are updated based on interview reports from the past 12 months. This ensures you're practicing questions that are currently being asked, not outdated problems from years ago.
Which companies ask the Blind 22 questions?
The Blind 22 questions are asked at major tech companies including Google, Meta (Facebook), Amazon, Apple, Netflix, Uber, Twitter, Stripe, Airbnb, and more. Each question is tagged with the companies known to ask it.
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