Undo & Redo Problem | Amazon Frontend Machine Coding Round Interview | React Interview Challenge

🟠 Undo & Redo Problem in ReactJS | Amazon Frontend Interview Challenge | Machine Coding Round Explained

Welcome to Code Pravah!
In this video, we’ll tackle a real-world ReactJS challenge inspired by an actual Amazon Frontend Machine Coding Round Interview: the Undo & Redo Problem.

We’ll build a fully interactive UI in ReactJS where users can draw circles by clicking inside a div, and then use Undo and Redo buttons to navigate their actions — just like in professional design tools.

This problem is a brilliant test of React logic, state management, and problem-solving skills — ideal for anyone preparing for frontend interviews, ReactJS machine coding rounds, or looking to upgrade their portfolio with a functional mini project.

🎯 What You’ll Learn in This Video:

✅ How to track and render click positions in React
✅ Building a custom Undo/Redo system from scratch
✅ Using React Hooks (useState) effectively
✅ Using Mouse events in React
✅ Managing dynamic UI state history in an interview scenario
✅ Structuring clean and scalable React component logic
✅ Tips to impress interviewers with a step-by-step thought process

💡 Why You Should Watch This:

🔹 Based on a real Amazon frontend interview problem
🔹 Great for ReactJS interview preparation and machine coding practice
🔹 Helps build a strong foundation in state & event handling
🔹 Resume-ready mini project with interactive functionality
🔹 You’ll learn to think like a developer under interview pressure

📌 Project Features:

Draw circles based on exact mouse clicks
Undo button: removes last drawn circle in order
Redo button: re-adds undone circles accurately
Fully built with ReactJS + Hooks + custom logic
Clean UI and user-friendly behaviour
Teaches real-world state management techniques

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GitHub Link- https://github.com/codepravah/undo-redo

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