For system design knowledge, please find system-design-knowledge repo.

• Procedure

• distributed email system (System design interview vol2)

* = incomplete

• Build a real-time gaming leaderboardboard (System design interview vol2)
• Build a currency exchange system
• Build a traffic control system
  • Requirements
    • A group of traffic lights has two components: main lights and pedestrian lights.
    • Main traffic lights have three colors: red, yellow and green.
    • Pedestrian lights have two colors: red and green.
    • Pedestrian lights' colors are reversed from main lights:
      • Main: red/yellow - pedestrian's: green
      • Main: green - pedestrian: red
    • There is a button for pedestrian lights if the button is pushed in advance, pedestrian's lights change colors according to the main ones if the button isn't pushed, pedestrian's lights remain red.
    • A typical junction has 4 groups of lights.
    • Additional question: design the system in a way that allows cars which start from one junction after a red light don't have to stop at the next one.
  • Key points in solution
    • Cnosider all phase transitions (from red to green, red to orange to green, and so on)
    • Be clear on the conditions in which a certain transition will take place
    • Consider pedestrian crossing requirements
    • Determine cycle length
    • Determine clearance time
    • Apportion green light approriately
• Build a counter system for online services
• Build a game of chess
• Build a parking garage
• Build an online bookstore
• Build an e-commerce website
  • How to handle transactions?
• Build an elevator system
• Build a vending machine
• Build a task management system - Trello
  • Requirement
    • User can move tasks from one lane to the other and move it back.
    • This should have a state diagram with many end states.
• Build a card game
  • There should be more than one method of cards distribution such as even distribution, uneven distribution, etc.
  • There are multiple situations which could be considered as a winning situation:
    • One who finishes all his cards early.
    • One who earns the maximum points at the last.
• Build a restaurant management system.

• https://tianpan.co/notes/2016-02-13-crack-the-system-design-interview
• https://medium.com/coders-mojo/complete-system-design-series-part-1-45bf9c8654bc

System Design Interview

• Design A Rate Limiter
• Design A Key-value Store
• Design A Unique ID Generator In Distributed Systems
• Design A URL Shortener
• Design A Web Crawler
• Design A Notification System
• Design A News Feed System
• Design A Chat System
• Design A Search Autocomplete System
• Design YouTube
• Design Google Drive
• Proximity Service
• Nearby Friends
• Google Maps
• Distributed Message Queue
• Metrics Monitoring and Alerting System
• Ad Click Event Aggregation
• Hotel Reservation System
• Distributed Email Service
• S3-like Object Storage
• Real-time Gaming Leaderboard
• Payment System
• Digital Wallet
• Stock Exchange

Exponent

• Design a URL Shortener
• Design Instagram
• Design Amazon Prime Video
• Design YouTube
• Design TikTok
• Design Uber Eats
• Design Facebook Messenger
• Design ChatGPT
• Design a Parking Garage
• Design a Rate Limiter
• Design the Payment System for the Amazon Kindle
• Design a Landmark Recognition System
• Design Typeahead for Search Box
• Design a Hotel Booking Service
• Design a Web Crawler
• Design a Distributed Message Queue

Design Gurus | Grokking Modern System Design Interview

• Designing a URL Shortening Service like TinyURL
• Designing Pastebin
• Designing Instagram
• Designing Dropbox
• Designing Facebook Messenger
• Designing Twitter
• Designing Youtube or Netflix
• Designing Typeahead Suggestion
• Designing an API Rate Limiter
• Designing Twitter Search
• Designing a Web Crawler
• Designing Facebook’s Newsfeed
• Designing Yelp or Nearby Friends
• Designing Uber backend
• Designing Ticketmaster

Educative | Grokking Modern System Design Interview for Engineers & Managers

• Design YouTube
• Design Quora
• Design Google Maps
• Design a Proximity Service / Yelp
• Design Uber
• Design Twitter
• Design Newsfeed System
• Design Instagram
• Design a URL Shortening Service / TinyURL
• Design a Web Crawler
• Design WhatsApp
• Design Typeahead Suggestion
• Design a Collaborative Document Editing Service / Google Docs

• https://leetcode.com/discuss/interview-question/3766958/Bookmark-It-%3A-System-Design-and-Most-popular-Coding-Questions