React tutorial Quiz 1

Test your understanding of core React concepts with this 10-question quiz.Covers JSX, Virtual DOM, Components, Conditional Rendering, and more.Ideal for beginners looking to strengthen their React fundamentals.

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Question 1

What is React?

  • A front-end JavaScript library for building user interfaces

  • A back-end framework for handling server requests

  • A database for managing data storage

  • A programming language for writing server-side code

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Question 2

What is the purpose of the Virtual DOM in React?

  • It improves server performance.

  • It provides a faster way to update the user interface.

  • It helps in routing between pages.

  • It is used for managing application state.

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Question 3

Which of the following correctly describes JSX?

  • A templating engine for React

  • A syntax extension for JavaScript

  • A CSS preprocessor used in React

  • A database query language

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Question 4

Which of the following is a correct way to import a component in React?

  • import { App } from './App.js'

  • require App from './App.js'

  • include App from './App.js'

  • import App from './App.js'

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Question 5

Which statement about React components is true?

  • Only class components can hold state

  • Components must be stored in .jsx files

  • Both function and class components can be used in React

  • Components can’t be reused

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Question 6

What is a React component?

  • A reusable piece of code that returns JSX

  • A JavaScript variable

  • A function to connect React with the backend

  • A tool for compiling JSX

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Question 7

What is the purpose of the ReactDOM.render method?

  • To manage application state

  • To compile JSX into JavaScript

  • To render a React component into the DOM

  • To define the Virtual DOM

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Question 8

Which of the following statements about the Virtual DOM is true?

  • It is the actual DOM manipulated directly by React components.

  • It is a programming interface for web documents.

  • It is a lightweight, in-memory representation of the actual DOM.

  • It is used primarily for rendering static content in React applications.

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Question 9

How can you conditionally render a component in React?

  • Using if directly in return statement

  • Using && or ternary operator inside JSX

  • Using switch inside return

  • Using console.log()

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Question 10

What will be the output of this React code?
import React from 'react';

import ReactDOM from 'react-dom';

function App() {

const greeting = "Hello";

return <h1>{greeting} World</h1>;

}

ReactDOM.render(<App />, document.getElementById('root'));


  • Hello World

  • {greeting} World

  • "Hello World"

  • Error

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There are 10 questions to complete.

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