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

Welcome to Lecture 15 of the Ultimate Low-Level Design (LLD) Series by Coder Army! Third 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’ll explore the *Command Design Pattern* through a practical *Smart Home Automation* example. You’ll learn how to: 1. *Encapsulate device actions* (turn lights on/off, fan on/off etc) into reusable command objects 2. *Build a flexible Invoker* that queues, executes, and even *undoes* commands 3. *Visualize the architecture* with clear *UML diagrams* 4. *Walk through real-world code* (C++/Java) to see the pattern in action Whether you’re automating your living room or architecting a scalable IoT platform, the Command Pattern is your key to clean, decoupled, and extensible code. 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 02:51 Building Smart Home Automation 06:08 UML Design 13:35 Introducing Undo Command 16:50 Code for Example 21:18 Command Pattern Doubts 25:11 Real world use case 28:16 Standard Definition #SystemDesign #LowLevelDesign #LLD #CommandPattern #DesignPatterns #Cplusplus #JavaDevelopers #UMLDiagrams #TechInterviews #SoftwareEngineering #SmartHome #CleanCode #SoftwareArchitecture #ObjectOrientedDesign #CodingWithExamples #CodeBetter #8WeeksLLDChallenge