Reactjs Quiz - CodingKite

Reactjs Quiz

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What is React.js?

A programming language

A JavaScript library for building user interfaces

A framework for building backend applications

A database management system

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What is JSX in React.js?

JavaScript Extensible Markup Language

JavaScript XML

JavaScript and XML Syntax

JavaScript Expressive Syntax

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What function is used to render a React component to the DOM?

ReactDOM.render()

ReactDOM.renderComponent()

React.renderDOM()

React.render()

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What is the purpose of the state in React components?

To store static data

To store data that can change over time

To handle events

To define component structure

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What is the lifecycle method that is called after a component is rendered for the first time?

componentDidMount()

componentDidUpdate()

componentWillMount()

componentWillRender()

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What is a key prop used for in React lists?

To uniquely identify each element in the list

To style each element in the list

To define the order of elements in the list

To specify the type of each element in the list

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Which method is used to update the state in a React component?

setState()

updateState()

modifyState()

changeState()

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What is the virtual DOM in React.js?

A real-time database

A virtual representation of the DOM in memory

A built-in DOM manipulation library

A server-side rendering engine

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What is the purpose of props in React components?

To initialize state

To hold the data that needs to be passed to a component

To define component structure

To handle user inputs

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Which hook is used to perform side effects in functional components in React?

useEffect()

useState()

useCallback()

useMemo()

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What is the purpose of the key prop in React lists?

To uniquely identify each element in the list

To style each element in the list

To determine the order of elements in the list

To specify the type of each element in the list

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Which lifecycle method is used to perform cleanup in a React component?

componentDidUpdate()

componentWillUnmount()

componentDidMount()

componentWillMount()

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What is the purpose of the useState hook in React?

To fetch data from an external API

To manage component state in functional components

To handle user events like clicks and inputs

To create reusable custom hooks

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What are the two types of components in React?

Functional components and Class components

Stateful components and Stateless components

Parent components and Child components

Container components and Presentational components

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What is the purpose of a React component?

To define the structure of HTML elements

To store and manipulate data

To define reusable UI elements

To manage server-side logic

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What is the purpose of the props.children property in React?

To define default props for a component

To pass data from a parent component to a child component

To handle errors in component rendering

To access the children of a React component

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What is the purpose of the ReactDOM.render method in React?

To render React components to the DOM

To render HTML elements to the DOM

To update component state

To handle user input events

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What is the JSX syntax extension in React used for?

To define JavaScript functions

To define HTML-like syntax within JavaScript code

To import external libraries

To define CSS styles inline

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What is the purpose of the useEffect hook in React?

To manage component state

To handle asynchronous operations

To perform side effects in functional components

To render JSX elements

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How do you pass data from a parent component to a child component in React?

Using the "props" attribute

Using the "state" attribute

Using the "data" attribute

Using the "passData" method

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The average score is 66%