✅ Complete Tic-Tac-Toe System Design & Low Level Design | Full Explanation + Code

Article - https://codewitharyan.com/system-design/low-level-design Structured DSA (Basics to Advanced) Practice - https://codewitharyan.com/cwa-sheet/practice-problems My Uber Interview Experience - https://youtu.be/VGYJIX5yl74 My Coinbase Interview Experience - https://youtu.be/IjOC18b_dCw My American Express Inteview Experience - https://youtu.be/c3UhYefhnqk My JP Morgan & Chase Interview Experience - https://youtu.be/-jacTpY57no ..... more coming soon (along with LLD course on Second Channel) Most Frequently asked questions based on Leetcode Premium - https://codewitharyan.com/cwa-sheet/aryan-dsa-master-sheet LLD Syllabus which we gonna cover - https://codewitharyan.com/system-design/low-level-design Let's Connect: Main Channel for DSA & Live Streams - https://www.youtube.com/@ARYANMITTAL X Twitter : https://x.com/aryan_mittal007 📱Discord (Join Community) : https://discord.gg/vwUAz2pEHZ 📝Linkedin (About me): https://www.linkedin.com/in/aryan-mittal-0077 📸 Instagram: https://www.instagram.com/codewitharyanbhai 📱Telegram : https://t.me/aryan_mittal_group 🤖 Github: https://github.com/aryan-0077 ✨ Timelines✨ 00:00 Introduction: Cracking LLD Interviews at Uber, Confluent, Indeed & More 00:31 Starting with Tic Tac Toe - The Classic LLD Problem 01:04 Interview Flow Overview 02:12 What is Tic Tac Toe? Game Explanation 03:31 Rules of Tic Tac Toe - Winning and Draw Conditions 04:45 Illegal Moves in Tic Tac Toe 06:03 How to Approach Tic Tac Toe in an Interview 07:15 Interviewer's Expectations and Clarifications 08:43 Enacting the Game for Better Understanding 10:23 Key Components and Entities of the Game 12:04 Introduction to Design Challenges in LLD Interviews 13:17 Why You Must Mention Design Patterns Even If Not Fully Used 14:55 Strategy Pattern for Player Moves (Human & AI) 17:03 Observer Pattern: Optional but Powerful 18:05 Factory Pattern: Creating Players & Symbols 19:48 Why Design Patterns Help in Interview Impressions 20:58 Preparing to Write the Actual Code 23:03 Bottom-Up Approach to Class Diagram 24:05 Implementing Strategy Pattern for Players 25:02 State Design Pattern Overview 27:02 Game Context and State Transitions 28:40 Is State Pattern Essential for Tic Tac Toe? 30:03 Implementing the Board Class & Key Functions 32:00 Handling Moves, Validations & Board Logic 34:06 Modularizing Code & Validating Player Moves 36:01 Implementing the Tic Tac Toe Game Class 37:11 The Play Method - Running the Game Loop 38:52 Helper Methods: Switching Players & Announcing Results 40:05 Organizing Playable Board Games for Future Extensibility 41:48 Extending the Game for Multiple Players 43:02 Observer Pattern in Action for Game Notifications 44:59 Optional State Pattern Simplification for Interviews 46:00 Factory Pattern for Player Creation 47:31 Final Thoughts on Interview Expectations & Time Management 48:53 Wrapping Up the Lecture & Interview Tips 49:03 Outro: Like, Share, and Stay Tuned! ✨ Hashtags ✨ #programming #Interviews #leetcode #faang #maang #datastructures #algorithms #low-level-design #lld-by-aryan #lowleveldesign #systemdesign #systemdesigninterview #lowlevelsystemdesign #designtictactoe #lowleveldesigninterviewquestions #objectorienteddesign #designpatterns #highleveldesign #grokkingthesystemdesigninterview #lowlevelsystemdesigninterviewquestions #lowleveldesignoftictactoe #systemdesignexplanation #systemdesigninterviews #lowleveldesigninterview #lowleveldesignmockinterview #tictactoe #tictactoesystemdesign