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