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This repository contains resources to learn Low Level Design (LLD) / Object Oriented Design (OOD) and prepare for interviews.

👉 For a better and more comprehensive experience, checkout theLLD page at AlgoMaster.io

• Classes and Objects
• Enums
• Interfaces
• Encapsulation
• Abstraction
• Inheritance
• Polymorphism

• Association
• Aggregation
• Composition
• Dependency

• DRY Principle
• YAGNI Principle
• KISS Principle
• SOLID Principles with Pictures
• SOLID Principles with Code

• Class Diagram
• Use Case Diagram
• Sequence Diagram
• Activity Diagram
• State Machine Diagram

• Design Parking Lot
• Design Stack Overflow
• Design a Vending Machine
• Design Logging Framework
• Design Traffic Signal Control System
• Design Coffee Vending Machine
• Design a Task Management System

• Design ATM
• Design LinkedIn
• Design LRU Cache
• Design Tic Tac Toe Game
• Design Pub Sub System
• Design an Elevator System
• Design Car Rental System
• Design an Online Auction System
• Design Hotel Management System
• Design a Digital Wallet Service
• Design Airline Management System
• Design a Library Management System
• Design a Social Network like Facebook
• Design Restaurant Management System
• Design a Concert Ticket Booking System

• Design CricInfo
• Design Splitwise
• Design Chess Game
• Design a Snake and Ladder game
• Design Ride-Sharing Service like Uber
• Design Course Registration System
• Design Movie Ticket Booking System
• Design Online Shopping System like Amazon
• Design Online Stock Brokerage System
• Design Music Streaming Service like Spotify
• Design Online Food Delivery Service like Swiggy

• Master LLD Interviews - AlgoMaster.io

• Head First Design Patterns
• Clean Code
• Refactoring: Improving the Design of Existing Code

• AlgoMaster Newsletter

• Coursera - Object-Oriented Design
• Coursera - Design Patterns
• Github - Awesome Design Patterns

Contributions are welcome! If you'd like to add a new problem, improve existing content, or fix errors:

1. Fork the repository
2. Create a feature branch:git checkout -b feature/your-feature-name
3. Commit your changes:git commit -m 'Add some feature'
4. Push to the branch:git push origin feature/your-feature-name
5. Submit a pull request

Please make sure to update Readme files and documentation as appropriate.

If you find this resource helpful, please give it a star and share it with others!