The Ultimate React JS Knowledge Quiz
Test your knowledge and see how well you know React JS with this challenging quiz!
Question 1 of 15The Ultimate React JS Knowledge Quiz
All 15 questions
- What is React JS primarily used for in web development?Creating server-side logic · Designing the database schema · Building user interfaces · Managing networking
- Which company developed React?Google · Facebook · Microsoft · Twitter
- What is the purpose of the Virtual DOM in React?It allows direct manipulation of the real DOM · It improves performance by minimizing direct DOM updates · It serves as a complete replacement for the real DOM · It manages server-side rendering
- Which React hook is used to handle side effects?useState · useEffect · useContext · useReducer
- In React, what is a component?A function or class that renders part of the UI · A library for managing state · A behavioral design pattern · A method for handling HTTP requests
- What does JSX stand for?JavaScript XML · JavaScript Extension · JSON XML · Java Syntax Extender
- How do you pass data to a component in React?Props · State · Hooks · Context
- Which method in a React class component is used to set up initial state?componentDidMount · render · getInitialState · constructor
- What does 'lifting state up' mean in React?Moving state to a higher level component to share between child components · Transferring state from one component to another · Preserving state during component re-renders · Initializing state within a component
- What is the purpose of the key attribute in React lists?To identify DOM elements for styling purposes · To help React identify which items have changed, are added, or removed · To pass data through props · To reference elements for event handling
- What is the default method of data binding in React?Two-way data binding · One-time data binding · Event-driven data binding · One-way data binding
- Which tool can be used to build a new React app conveniently?Angular CLI · Vue CLI · Create React App · Ember CLI
- What is Context used for in React?To handle HTTP requests · To provide and consume global data · To manage component lifecycle methods · To define component structure
- What is a React Fragment used for?Handling forms · Rendering multiple elements without a wrapper node · Managing application state · Styling components
- How do you create a functional component in React?function Component() {} · class Component extends React.Component {} · React.createClass() · new Component()
