🧠 100 Interview Questions – HTML, CSS, JavaScript, React, Node.js, and MERN

Welcome to the 100 Interview Questions repository!
This collection is crafted to help developers prepare for frontend, backend, and full-stack MERN interviews. It contains carefully curated and frequently asked technical questions across:

• HTML
• CSS
• JavaScript (Core + ES6+)
• React.js
• Node.js
• MERN Stack (MongoDB, Express, React, Node)

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📂 Table of Contents

1. HTML Questions
2. CSS Questions
3. JavaScript Questions
4. React.js Questions
5. Node.js Questions
6. MERN Stack Questions
7. How to Use
8. Contribute
9. License

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✅ 1. HTML

• Semantic HTML
• Accessibility (ARIA)
• SEO best practices
• Forms and validation
• Media elements

🎨 2. CSS

• Box model
• Positioning and Flex/Grid layout
• Specificity and inheritance
• Responsive design (Media queries)
• Animations and transitions

🧮 3. JavaScript

• Closures, Scope, Hoisting
• Promises, Async/Await
• Event loop and call stack
• ES6+ features (Destructuring, Spread/Rest, etc.)
• DOM manipulation

⚛️ 4. ReactJS

• Lifecycle methods / Hooks
• Component state and props
• Conditional rendering
• Context API and Redux (basics)
• Optimization techniques

🔌 5. NodeJS

• Event-driven architecture
• File system module
• Middleware & Express basics
• REST APIs
• Error handling and debugging

🌐 6. MERN Stack

• Integrating MongoDB with Node/Express
• RESTful API with Express.js
• React frontend with backend APIs
• Authentication (JWT/session-based)
• Deployment strategy

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📚 How to Use

Clone the repo and start exploring each topic based on your interview needs:

git clone https://github.com/your-username/100-interview-questions.git
cd 100-interview-questions