React Basics

Question 1

What is JSX?

Answer 1

JSX stands for JavaScript XML. It allows developers to write HTML-like code inside JavaScript, making it easier to create React components.

Question 2

How does React differ from vanilla JavaScript or jQuery when updating the DOM?

Answer 2

React uses a virtual DOM. When state or props change, it creates a virtual update and then efficiently updates the real DOM only where changes occurred.

Question 3

What are the key differences between class components and functional components in React?

Answer 3

Class components have lifecycle methods and can have state, while functional components are simpler and can utilize hooks for state and side effects.