Low-Level Design Interviews

Welcome to the Low-Level Design course. This course helps you build strong, interview-ready designs with clear class responsibilities and clean code practices.

This lesson explains What is LLD in simple terms and shows how it helps you design clear, testable code.

This lesson explains LLD vs HLD in simple terms and shows how it helps you design clear, testable code.

This lesson explains LLD Interview Types in simple terms and shows how it helps you design clear, testable code.

This lesson explains Classes and Objects in simple terms and shows how it helps you design clear, testable code.

This lesson explains Enums in simple terms and shows how it helps you design clear, testable code.

This lesson explains Interfaces in simple terms and shows how it helps you design clear, testable code.

This lesson explains Encapsulation in simple terms and shows how it helps you design clear, testable code.

This lesson explains Abstraction in simple terms and shows how it helps you design clear, testable code.

This lesson explains Inheritance in simple terms and shows how it helps you design clear, testable code.

This lesson explains Polymorphism in simple terms and shows how it helps you design clear, testable code.

This lesson explains Association in simple terms and shows how it helps you design clear, testable code.

This lesson explains Aggregation in simple terms and shows how it helps you design clear, testable code.

This lesson explains Composition in simple terms and shows how it helps you design clear, testable code.

This lesson explains Dependency in simple terms and shows how it helps you design clear, testable code.

This lesson explains Realization in simple terms and shows how it helps you design clear, testable code.

This lesson explains Dry in simple terms and shows how it helps you design clear, testable code.

This lesson explains Kiss in simple terms and shows how it helps you design clear, testable code.

This lesson explains Yagni in simple terms and shows how it helps you design clear, testable code.

This lesson explains Lod in simple terms and shows how it helps you design clear, testable code.

This lesson explains Soc in simple terms and shows how it helps you design clear, testable code.

This lesson explains Coupling and Cohesion in simple terms and shows how it helps you design clear, testable code.

This lesson explains Composing Objects in simple terms and shows how it helps you design clear, testable code.

This lesson explains Single Responsibility Principle (SRP) in simple terms and shows how it helps you design clear, testable code.

This lesson explains Open-Closed Principle in simple terms and shows how it helps you design clear, testable code.

This lesson explains LSP in simple terms and shows how it helps you design clear, testable code.

This lesson explains ISP in simple terms and shows how it helps you design clear, testable code.

This lesson explains DIP in simple terms and shows how it helps you design clear, testable code.

Class Diagram helps you visualize design before you write code. It is a simple way to explain structure and flow to others.

Use Case Diagram helps you visualize design before you write code. It is a simple way to explain structure and flow to others.

Sequence Diagram helps you visualize design before you write code. It is a simple way to explain structure and flow to others.

Activity Diagram helps you visualize design before you write code. It is a simple way to explain structure and flow to others.

Design patterns are reusable solutions to common design problems. They help you write code that is easier to change and test.

Singleton is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Builder is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Factory Method is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Abstract Factory is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Prototype is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Adapter is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Facade is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Decorator is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Composite is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Proxy is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Bridge is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Flyweight is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Strategy is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Iterator is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Observer is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Command is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

State is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Template Method is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Chain of Responsibility is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Visitor is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Mediator is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Memento is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Null Object is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Repository is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

MVC is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Dependency Injection is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Specification is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Game Loop is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Thread Pool is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

Producer Consumer is a reusable way to solve a common design problem. It gives you a proven structure so your code stays clean as it grows.

This lesson gives practical advice to help you perform well in low-level design interviews.

This lesson gives practical advice to help you perform well in low-level design interviews.

This lesson gives practical advice to help you perform well in low-level design interviews.

Design a clean object model for a tic tac toe. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a snake and ladder. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a lru cache. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a bloom filter. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a parking lot. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a search autocomplete. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a task management system. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a notification system. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a stack overflow. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a atm. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a logging framework. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a pub sub. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a elevator system. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a chat application. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a search engine. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a splitwise. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a payment gateway. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a url shortener. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a rate limiter. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a inventory management system. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a vending machine. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a library management system. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a traffic control system. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a social network. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a learning platform. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a minesweeper. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a spotify. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a amazon. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a linkedin. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a cricinfo. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a coffee vending machine. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a restaurant management system. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a online stock exchange. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a movie booking system. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a online auction system. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a in memory file system. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a version control system. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a online food delivery service. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a uber. Focus on responsibilities, relationships, and core flows.

Design a clean object model for a task scheduler. Focus on responsibilities, relationships, and core flows.