React JS - Part 1

Who developed ReactJS?

• Facebook

• Google

• Microsoft

• Twitter

What is ReactJS primarily used for?

• Server-side rendering

• Backend development

• Building user interfaces

• Machine learning

Which concept in React optimizes rendering performance?

• Redux

• Virtual DOM

• All Of Above

• State Management

What is React.js?

• A JavaScript framework

• A JavaScript library for building user interfaces

• A backend development tool

• A database management system

Which command is used to create a new React app?

• npm install react-app

• npm new-react my-app

• react-init my-app

• npx create-react-app my-app

What is the entry point of a React app?

• App.jsx

• index.html

• package.json

• config.jsx

What does JSX stand for?

• Javascript XML

• Java Syntax Extension

• Javascript Xtreme

• Javascript Extension

What is required when using multiple JSX elements?

• Commas between elements

• An array

• <div> or <Fragment> wrapper

• Single quotes

How do you embed a JavaScript variable in JSX?

• {{variable}}

• {variable}

• <variable>

• [variable]

What are React components?

• Built-in HTML tags

• JavaScript objects

• Only functions

• Functions or classes that return JSX