The Ultimate React JS Knowledge Quiz
TITO IS KING
Created 6/19/2024
Test your knowledge and see how well you know React JS with this challenging quiz!
1. What is React JS primarily used for in web development?
Creating server-side logic
Designing the database schema
Building user interfaces
Managing networking
2. Which company developed React?
Google
Facebook
Microsoft
Twitter
3. 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
4. Which React hook is used to handle side effects?
useState
useEffect
useContext
useReducer
5. 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
6. What does JSX stand for?
JavaScript XML
JavaScript Extension
JSON XML
Java Syntax Extender
7. How do you pass data to a component in React?
8. Which method in a React class component is used to set up initial state?
componentDidMount
render
getInitialState
constructor
9. 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
10. 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
11. 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
12. Which tool can be used to build a new React app conveniently?
Angular CLI
Vue CLI
Create React App
Ember CLI
13. 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
14. What is a React Fragment used for?
Handling forms
Rendering multiple elements without a wrapper node
Managing application state
Styling components
15. How do you create a functional component in React?
function Component() {}
class Component extends React.Component {}
React.createClass()
new Component()
