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These are 20 popular system design questions. Each question requires you to think of how it's core engineering requirements can be fulfilled.

Since these requirements are (largely) mutually-exclusive, you see a diverse set of engineering patterns while solving them. These patterns help solve problems in both interviews and real-world design discussions.

Social Media App

  1. Design a social media app like Instagram

Booking Systems

  1. Design a seat-booking system like BookMyShow

  2. Design a ticket booking system like IRCTC

Cloud Management and Analytics

  1. Design a cloud solution provider like Amazon Web Services

  2. Design an analytics system like Google Analytics

  3. Design an anomaly detection system like PagerDuty

Payments

  1. Design a payments gateway like Stripe

  2. Design a subscription management system like Adobe

Online Shopping

  1. Design an e-commerce app like Amazon

Chat App

  1. Design a chat application like WhatsApp

Location Based Services

  1. Design a cab-aggregation service like Uber

  2. Design a food-aggregation service like Doordash

Gaming

  1. Design a turn based online-gaming service like Chess

  2. Design a real time gaming service like WarCraft

File Sharing

  1. Design a documentation system like Google Docs

  2. Design a file management system like Amazon S3

Emailing

  1. Design an emailing service like GMail

Video Processing

  1. Design a live-streaming broadcast app like ESPN

  2. Design an on-demand streaming app like Netflix

  3. Design a live-streaming social media app like Twitch

Video lessons: https://interviewready.io/