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