This repository contains all the resources needed to crack LLD interviews at big tech companies.
I am keeping my notes and all the resources I create and curate from various sources organized in one place.

What you will find in this repository

Table of Contents 📚

• Introduction
• Object Oriented Programming
• Design Principles
• Design Patterns

Introduction

• What is LLD ?

Object Oriented Programming

• Class & Object

Design Principles

• SOLID
• DRY
• KISS
• YAGNI

Design Patterns

Creational 🏗	Behavioral 🧠	Structural 🧩
Singleton	Strategy	Adapter
Factory	Observer	Proxy
Abstract Factory	Iterator	Facade
Builder	Command	Decorator
Prototype	State	Composite

Multithreading & Concurrency

LLD Interview Problems

Must solve

• Parking Lot
• Snake and Ladder
• Tic Tac Toe Game
• Vending Machine
• Elevator System
• ATM Machine
• Library Management System
• Notification Service
• Online Aucation System
• In Memeory Cache
• Logging System
• Splitwise
• Chess Game
• File System
• Movie Booking Systen (BookMyShow)
• Ride Sharing App(Uber/ Ola)
• Rate Limiter

Concurrency Interview Problems

• Producer Consumer Problem
• Print Zero Even Odd
• Fizz Buzz Multithreaded
• Design Bounded Blocking Queue
• The Dining Philosophers
• Multithreaded Web Crawler