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