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