React Quiz I

What is React?

• A front-end JavaScript library developed by Facebook in 2011.

• A back-end framework like Node.js.

• A database management system.

• A CSS preprocessor.

What is a SPA (Single Page Application)?

• A web application that dynamically updates the page without reloading it.

• A website with multiple HTML pages loaded separately.

• A mobile app that doesn't require a browser.

• A React-specific feature.

Which of the following are features of React?

• Uses the virtual DOM instead of the real DOM.

• Supports server-side rendering.

• Follows uni-directional data flow.

• Requires Java to work.

What are some major advantages of React?

• Increases application performance.

• Can be used on both client and server sides.

• JSX improves code readability.

• Requires an internet connection at all times to function.

What is create-react-app used for?

• A command-line tool to set up a new React application.

• A database management tool.

• A UI framework like Bootstrap.

• A built-in React function to create components.

What is the use of empty tags (<> ) in React?

• Used for declaring fragments.

• Used to create an empty div.

• Used to comment out JSX code.

• Used to add external scripts.

What is JSX?

• A syntax extension that looks like XML and works with JavaScript.

• Syntactic sugar for React.createElement().

• A new programming language for React.

• A built-in JavaScript function.

Can the browser read JSX?

• No, JSX must be transpiled into JavaScript using Babel.

• Yes, browsers natively support JSX.

• Only modern browsers can understand JSX directly.

• JSX is just another form of JSON.

What is React props?

• Props (short for properties) are used to pass data between components.

• Props are functions that update the component state.

• Props are only used for styling components.

• Props are a built-in React hook.

Can we send a function as props in React?

• Yes, functions can be passed as props.

• No, only objects and strings can be passed as props.

• Functions can only be defined inside components but not passed around.

• Functions cannot be used inside JSX.