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10 items
ReactJS Quiz
Test your knowledge of ReactJS, frontend development, and JavaScript with this quiz!
What is the purpose of the render() method in React?
To update the component's state
To render the component's UI
To handle user input
To define the component's lifecycle
What is the purpose of the componentWillUnmount() method in React?
D. To render the component to the DOM
B. To initialize the component before mounting
A. To perform cleanup before the component is unmounted
C. To update the component's state after mounting
What is the difference between props and state in React?
Props are read-only, state is mutable
They are both mutable
They are the same
State is read-only, props are mutable
What is a React component?
A class that extends React.Component
A function that returns JSX
A class that extends Component
A function that returns HTML
What is JSX?
JavaScript eXtension
JavaScript Extension
JavaScript Syntax
JavaScript XML
What is a state in React?
A JavaScript object that stores component data
A React component that handles user input
A built-in React component
A React lifecycle method
What is the purpose of the componentDidMount() method in React?
To render the component
To define the component's props
To perform actions after the component is mounted
To update the component's state
What is the virtual DOM in React?
A lightweight copy of the actual DOM
A mechanism for optimizing DOM updates
A separate DOM tree for tracking changes
A representation of the actual DOM
What is the difference between React and Angular?
Angular is a library, React is a framework
They are the same
They are both frameworks
React is a library, Angular is a framework
What is the difference between React Native and ReactJS?
React Native is for mobile development, ReactJS is for web development
React Native is a newer version of ReactJS
They are the same
ReactJS is for mobile development, React Native is for web development
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