# awesome-low-level-design **Repository Path**: aaaleo/awesome-low-level-design ## Basic Information - **Project Name**: awesome-low-level-design - **Description**: No description available - **Primary Language**: Unknown - **License**: GPL-3.0 - **Default Branch**: main - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 0 - **Forks**: 1 - **Created**: 2024-12-27 - **Last Updated**: 2025-01-14 ## Categories & Tags **Categories**: Uncategorized **Tags**: None ## README

This repository contains resources to learn Low Level Design (LLD) / Object Oriented Design (OOD) and prepare for interviews. ## 📌 Fundamental Concepts - [Basics OOP Concepts](https://blog.algomaster.io/p/basic-oop-concepts-explained-with-code) - [SOLID Principles with Pictures](https://medium.com/backticks-tildes/the-s-o-l-i-d-principles-in-pictures-b34ce2f1e898) - [SOLID Principles with Code](https://blog.algomaster.io/p/solid-principles-explained-with-code) - [DRY Principle](https://blog.algomaster.io/p/082450d8-0e7b-4447-a8dc-b7308e45f048) - [YAGNI Principle](https://blog.algomaster.io/p/8c3c7da7-885b-4a9c-a6e4-70ee02de4772) - [KISS Principle](https://blog.algomaster.io/p/21b57678-b351-4ed4-b390-3b6308af2f7d) - [Coursera - Object-Oriented Design](https://www.coursera.org/learn/object-oriented-design) ## ⚙️ Design Patterns | **Creational Patterns** | **Structural Patterns** | **Behavioral Patterns** | | ----------------------------------------------------------------------------- | --------------------------------------------------------------- | ------------------------------------------------------------------------------------------- | | [Singleton](https://blog.algomaster.io/p/singleton-design-pattern) | [Adapter](https://refactoring.guru/design-patterns/adapter) | [Chain of Responsibility](https://refactoring.guru/design-patterns/chain-of-responsibility) | | [Factory Method](https://refactoring.guru/design-patterns/factory-method) | [Bridge](https://refactoring.guru/design-patterns/bridge) | [Command](https://refactoring.guru/design-patterns/command) | | [Abstract Factory](https://refactoring.guru/design-patterns/abstract-factory) | [Composite](https://refactoring.guru/design-patterns/composite) | [Iterator](https://refactoring.guru/design-patterns/iterator) | | [Builder](https://refactoring.guru/design-patterns/builder) | [Decorator](https://refactoring.guru/design-patterns/decorator) | [Mediator](https://refactoring.guru/design-patterns/mediator) | | [Prototype](https://refactoring.guru/design-patterns/prototype) | [Facade](https://refactoring.guru/design-patterns/facade) | [Memento](https://refactoring.guru/design-patterns/memento) | | | [Flyweight](https://refactoring.guru/design-patterns/flyweight) | [Observer](https://refactoring.guru/design-patterns/observer) | | | [Proxy](https://refactoring.guru/design-patterns/proxy) | [State](https://refactoring.guru/design-patterns/state) | | | | [Strategy](https://refactoring.guru/design-patterns/strategy) | | | | [Template Method](https://refactoring.guru/design-patterns/template-method) | | | | [Visitor](https://refactoring.guru/design-patterns/visitor) | ## 🗂️ UML - [Class Diagram](https://blog.algomaster.io/p/uml-class-diagram-explained-with-examples) - [Use Case Diagram](https://www.visual-paradigm.com/guide/uml-unified-modeling-language/what-is-use-case-diagram/) - [Sequence Diagram](https://www.visual-paradigm.com/guide/uml-unified-modeling-language/what-is-sequence-diagram/) - [Activity Diagram](https://www.visual-paradigm.com/guide/uml-unified-modeling-language/what-is-activity-diagram/) - [State Machine Diagram](https://www.visual-paradigm.com/guide/uml-unified-modeling-language/what-is-state-machine-diagram/) ## ✅ [How to Answer a LLD Interview Problem](https://blog.algomaster.io/p/how-to-answer-a-lld-interview-problem)

## 💻 Low Level Design Interview Problems ### Easy - [Design Parking Lot](problems/parking-lot.md) - [Design a Vending Machine](problems/vending-machine.md) - [Design Stack Overflow](problems/stack-overflow.md) - [Design Logging Framework](problems/logging-framework.md) - [Design Coffee Vending Machine](problems/coffee-vending-machine.md) - [Design Traffic Signal Control System](problems/traffic-signal.md) - [Design a Task Management System](problems/task-management-system.md) ### Medium - [Design Pub Sub System](problems/pub-sub-system.md) - [Design Tic Tac Toe Game](problems/tic-tac-toe.md) - [Design Car Rental System](problems/car-rental-system.md) - [Design an ATM](problems/atm.md) - [Design Hotel Management System](problems/hotel-management-system.md) - [Design LinkedIn](problems/linkedin.md) - [Design a Social Network like Facebook](problems/social-networking-service.md) - [Design an Elevator System](problems/elevator-system.md) - [Design a Library Management System](problems/library-management-system.md) - [Design Restaurant Management System](problems/restaurant-management-system.md) - [Design Airline Management System](problems/airline-management-system.md) - [Design a Digital Wallet System](problems/digital-wallet-system.md) - [Design an Online Auction System](problems/online-auction-system.md) - [Design a Concert Ticket Booking System](problems/concert-ticketing-system.md) - [Design a Cache using LRU Eviction Policy](problems/lru-cache.md) ### Hard - [Design Movie Ticket Booking System](problems/movie-ticket-booking-system.md) - [Design Splitwise](problems/splitwise.md) - [Design a Snake and Ladder game](problems/snake-and-ladder.md) - [Design Online Shopping System like Amazon](problems/online-shopping-service.md) - [Design Online Stock Brokerage System](problems/online-stock-brokerage-system.md) - [Design CricInfo](problems/cricinfo.md) - [Design Chess Game](problems/chess-game.md) - [Design Ride-Sharing Service (like Uber)](problems/ride-sharing-service.md) - [Design Online Food Delivery Service (like Swiggy)](problems/food-delivery-service.md) - [Design Music Streaming Service (like Spotify)](problems/music-streaming-service.md) - [Design University Course Registration System](problems/course-registration-system.md) ## 📚 Books - [Head First Design Patterns](https://amzn.to/3AmTYEN) - [Clean Code](https://amzn.to/4hgxN3S) - [Refactoring: Improving the Design of Existing Code](https://amzn.to/3YyuH3Y) ## Additional resources - [Coursera - Design Patterns](https://www.coursera.org/learn/design-patterns) - [Github - Awesome Design Patterns](https://github.com/DovAmir/awesome-design-patterns)