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Basic quizzes for React.js

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Question 1

1 / 10

What is React.js primarily used for?

Building user interfaces Database management Server-side scripting Operating system development

Question 2

2 / 10

React.js is a library written in which programming language?

Java Python JavaScript C++

Question 3

3 / 10

What is the basic building block of a React application?

Function Class Component Module

Question 4

4 / 10

What command is used to create a new React project?

npm create-react-app npm install react npm start npm build

Question 5

5 / 10

What is JSX?

A JavaScript extension A type of database A CSS framework A build tool

Question 6

6 / 10

What is 'state' in React?

A type of HTML element Data that can change over time A CSS property A type of function

Question 7

7 / 10

What is the purpose of 'props' in React?

To define styles To pass data from parent to child components To manage the state To handle events

Question 8

8 / 10

Which method is called after a component is rendered?

componentWillMount componentDidMount componentWillUnmount render

Question 9

9 / 10

What is used to efficiently update the DOM in React?

Real DOM Virtual DOM Shadow DOM Browser DOM

Question 10

10 / 10

Which keyword is used to create a class component in React?

function component class object

Total Questions : 10

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