System Design Full Course - Facade Design Pattern | Real-world use case + Code | Design patterns in LLD

Welcome to Lecture 17 of the Ultimate Low-Level Design (LLD) Series by Coder Army! fourth week for #lowleveldesign #systemdesign #8weeksLLdchallenge. We are doing 8 weeks challenge and going to complete the whole course within the duration with quality content on Youtube. Let’s learn LLD like never before and attain advance level mastery on this subject. In this video, we dive deep into the *Adapter Design Pattern* by solving a real‐world problem: consuming a third‐party data provider that returns XML, and exposing it in our application as JSON. You’ll learn: In this video, we explore the Facade Design Pattern through a real‐world example: booting up a computer. Instead of making the client interact with each subsystem (power supply, cooling, BIOS, hard drive, OS), we introduce a single ComputerFacade class that wraps them all. You’ll see: - How subsystems like PowerSupply, CoolingSystem, BIOS, etc., work together - Why a Facade unifies those calls into one simple startComputer() method - The UML diagram illustrating the Facade’s relationships - A clean C++/Java implementation ready to use as a template for your projects Whether you’re building a media player, a home automation controller, or any multi‐component system, the Facade Pattern keeps your code clean and your clients happy. - Perfect for: - Beginners in System Design - Students preparing for LLD interviews - Developers looking to solidify design pattern concepts in real-world use Join Coder Army Whatsapp Group: https://whatsapp.com/channel/0029Va6H0tbHVvTbcuT99Y1f Code and Notes: Github : https://github.com/adityatandon15/LLD Connect with Aditya Tandon Instagram : https://www.instagram.com/adityatandon2 LinkedIn : https://www.linkedin.com/in/adityatandon2 Twitter : https://x.com/adityatandon02 00:00 Introduction 00:20 What the Facade is all about 03:27 Example of Computer Boot-up 06:53 Standard UML Diagram 07:17 Code for Example 08:36 Principle of Least Knowledge 10:36 Guidelines for PLK 14:16 Standard Definition 16:17 Real world Use Case #SystemDesign #LowLevelDesign #LLD #AdapterPattern #DesignPatterns #Cplusplus #JavaDevelopers #UMLDiagrams #TechInterviews #SoftwareEngineering #XMLtoJSON #CleanCode #SoftwareArchitecture #ObjectOrientedDesign #CodingWithExamples #CodeBetter #8WeeksLLDChallenge #JSON