Tic tac toe continued and Creational design patterns | Day 3 | LLD Bootcamp

Welcome to Day 4 of the Low-Level Design (LLD) Bootcamp by CodeKerdos. In this session, we continue our Tic-Tac-Toe Low-Level Design implementation and use it to understand how to approach LLD problems systematically in interviews. What we cover in this session: ✅ How to approach an LLD interview problem ✅ Clarifying requirements before starting the design ✅ Identifying core entities and responsibilities ✅ Defining relationships between classes ✅ Implementing the Tic-Tac-Toe game ✅ Handling game state and validation ✅ Using clean and maintainable object-oriented design ✅ Understanding the early return approach in business logic ✅ Introduction to Design Patterns ✅ Design Patterns Introduction We also introduce the three major categories of Design Patterns: ✅ Creational Patterns Singleton Factory Builder ✅ Structural Patterns Adapter Decorator Facade ✅ Behavioral Patterns Strategy Observer Command The goal of this bootcamp is not just to memorize patterns, but to understand when and why a particular design pattern should be used while solving real-world LLD problems. Homework: As part of the session, try to implement the Tic-Tac-Toe system from scratch without referring to the existing implementation. This will help you practice the complete LLD process — from requirements gathering to class design and implementation. If you're preparing for Software Engineering / SDE interviews, this session will help you build a strong foundation in LLD and Object-Oriented Design. Subscribe to CodeKerdos for more content on: ✅ Low-Level Design ✅ System Design ✅ Data Structures & Algorithms ✅ Java ✅ DevOps ✅ GenAI #LLD #LowLevelDesign #SystemDesign #DesignPatterns #TicTacToe #Java #SoftwareEngineering #SDE #CodingInterview #CodeKerdos #InterviewPreparation