🧠 199. What is Babel?

Babel is a JavaScript compiler that converts modern JavaScript into browser-compatible JavaScript.

Example:

Modern JS: const greet = () => { console.log("Hello") }

Converted to older JS that older browsers understand.

Benefits:

✅ Browser compatibility

✅ Support for modern JavaScript features

🧠 200. What is TypeScript and Why Use It?

TypeScript is a superset of JavaScript developed by Microsoft.

It adds: Static typing, Interfaces, Better tooling

JS: let age = 25

TS: let age: number = 25

Benefits:

✅ Fewer bugs

✅ Better code quality

✅ Improved IntelliSense

✅ Easier maintenance

🔥 Advanced Web Development Questions Frequently Asked in Interviews

Performance Optimization

1. What is Lazy Loading

2. What is Code Splitting

3. What is Tree Shaking

4. How can you improve website performance

5. What is caching

PWA

1. What is PWA

2. What are Service Workers

3. How does offline support work

React & Next.js

1. What is SSR

2. What is CSR

3. Difference between SSR and CSR

4. What is Hydration

5. Why use Next.js

Build Tools

1. What is Webpack

2. What is Babel

3. What is Vite

4. What is Parcel

TypeScript

1. What is TypeScript

2. Difference between TypeScript and JavaScript

3. Why do companies prefer TypeScript

Before attending a Web Development interview, make sure you're comfortable with:

✅ HTML5 & Semantic Tags

✅ CSS Flexbox & Grid

✅ JavaScript ES6+ Concepts

✅ DOM Manipulation

✅ React Hooks & State Management

✅ Node.js & Express.js

✅ SQL & MongoDB

✅ REST APIs & Authentication

✅ Git & GitHub

✅ Web Security Concepts

✅ Docker & Cloud Basics

✅ TypeScript Fundamentals

✅ Performance Optimization Techniques

🔥 Double Tap ❤️ For Part-10