by Ethel Richter
Step into the world of React, the powerful JavaScript library that has revolutionized front-end development. Whether you’re a seasoned developer or just starting out, this quiz will challenge your understanding of React’s core concepts, components, and state management. Test your knowledge and see how well you grasp the nuances of this essential tool in modern web development. Good luck and enjoy the challenge!
We recommend that you do not leave the page that you are taking this quiz in. Stay honest 🙂
React Quiz Questions Overview
1. What is the primary purpose of React?
Server-side scripting
Building user interfaces
Database management
Network security
2. Who developed React?
Google
Microsoft
Facebook
Apple
3. What is JSX?
A JavaScript library
A CSS preprocessor
A syntax extension for JavaScript
A database query language
4. Which method is used to create components in React?
React.component
React.createComponent
React.createElement
React.newComponent
5. What is the virtual DOM?
A copy of the real DOM
A JavaScript representation of the real DOM
A new type of DOM
A deprecated feature
6. How do you pass data to components in React?
Using state
Using props
Using hooks
Using context
7. What is a state in React?
A permanent storage
A way to pass data
A built-in object for managing component data
A method for rendering components
8. Which hook is used to manage state in functional components?
useEffect
useState
useContext
useReducer
9. What is the purpose of the useEffect hook?
To manage state
To perform side effects in function components
To create context
To fetch data from APIs
10. How do you handle events in React?
Using event listeners
Using event handlers
Using props
Using state
11. What is a higher-order component (HOC) in React?
A component that manages state
A component that handles events
A function that takes a component and returns a new component
A built-in React component
12. What does the React.Fragment component do?
Wraps elements in a div
Groups multiple elements without adding extra nodes to the DOM
Handles state management
Handles event delegation
13. What is the purpose of the key attribute in React?
To add styling
To identify elements in the DOM
To manage state
To handle events
14. What is the use of the useContext hook?
To manage state
To handle side effects
To consume context values
To create higher-order components
15. How do you create a context in React?
React.createContext
React.createElement
React.createContextAPI
React.createProvider
16. What is the purpose of the useReducer hook?
To manage simple state
To handle side effects
To manage complex state logic
To create context
17. What is the significance of the componentDidMount lifecycle method?
It is called before the component is rendered
It is called after the component is rendered
It is called before the component is updated
It is called after the component is updated
We recommend that you do not leave the page that you are taking this quiz in. Stay honest 🙂
