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