Abstract AlgorithmsAbstract Algorithms

All Series

Series

Low-Level Design Guide

8 articles·~178 min total·Updated
Design Patterns(4)
  1. 01

    LLD for Parking Lot System: Designing a Smart Garage

    Designing a parking lot is the 'Hello World' of OOP Design. Break down LLD using OOP pillars, SOLID, and classic design patterns.

    •19 min read
  2. 05

    LLD for Elevator System: Designing a Smart Lift

    OOP design of an elevator system: Encapsulation, Abstraction, Polymorphism, SOLID principles, and two design patterns — all in one domain model.

    •22 min read
  3. LLD for Tic-Tac-Toe: Designing an Extensible OOP Game07

    LLD for Tic-Tac-Toe: Designing an Extensible OOP Game

    A classic interview problem. We design an extensible Tic-Tac-Toe game that supports N*N grids, multiple players, and different winning strategies.

    •19 min read
  4. LLD for Ride Booking App: Designing Uber/Lyft08

    LLD for Ride Booking App: Designing Uber/Lyft

    How do you match a rider with a driver in real-time? We break down the Low-Level Design of a ride-sharing app using the Observer and Strategy patterns

    •21 min read
Database(1)
  1. 02

    LLD for URL Shortener: Designing TinyURL

    How do you turn a long URL into a 7-character string? We explore Base62 encoding, Hash collisions, and database choices.

    •22 min read
Concurrency(1)
  1. 03

    LLD for Movie Booking System: Designing BookMyShow

    Designing a movie booking system involves handling concurrency (no double bookings!), managing complex hierarchies, and ensuring a smooth user experie

    •24 min read
Caching(1)
  1. 04

    LLD for LRU Cache: Designing a High-Performance Cache

    OOP design breakdown: Cache<K,V> interface, SOLID principles, and the HashMap + DoublyLinkedList pattern that powers LRU eviction in Java.

    •23 min read
Coding Interview(1)
  1. 06

    Implement LLD for Parking Lot: Code Walkthrough

    Theory is good, code is better. We implement the Parking Lot system in Java, focusing on the Singleton, Factory, and Strategy patterns.

    •28 min read