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What is React JS?
- a) A JavaScript library for building user interfaces (Correct Answer)
- b) A server-side scripting language
- c) A relational database management system
- d) An operating system
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What does JSX stand for in React JS?
- a) JavaScript XML (Correct Answer)
- b) JSON with XML
- c) Java Standard Extensions
- d) JavaScript Extensions
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Which of the following is NOT a core feature of React JS?
- a) Virtual DOM
- b) JSX syntax
- c) Two-way data binding (Correct Answer)
- d) Component-based architecture
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Which lifecycle method is used for fetching data in React JS?
- a) componentWillMount()
- b) componentDidMount() (Correct Answer)
- c) componentDidUpdate()
- d) componentWillReceiveProps()
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In React, which method is used to change the state of a component?
- a) setState() (Correct Answer)
- b) changeState()
- c) updateState()
- d) modifyState()
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What is the purpose of React Router?
- a) To manage state in React components
- b) To handle routing and navigation in React applications (Correct Answer)
- c) To perform server-side rendering in React
- d) To manage HTTP requests in React
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What is the role of props in React components?
- a) Props are used for defining component state
- b) Props are used for styling components
- c) Props are used for passing data from parent to child components (Correct Answer)
- d) Props are used for defining component methods
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Which function is used to render a React component into the DOM?
- a) ReactDOM.render() (Correct Answer)
- b) React.renderComponent()
- c) ReactDOMComponent.render()
- d) ReactComponent.render()
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Which of the following is used for creating reusable UI components in React?
- a) Functions
- b) Classes
- c) Modules
- d) Props (Correct Answer)
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What method is called once the component is removed from the DOM in React?
- a) componentWillUnmount() (Correct Answer)
- b) componentDidUpdate()
- c) componentWillMount()
- d) componentDidMount()
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