language Publish on:-January 13th, 2020 , Category:- Web Development
React JS Interview Questions 
Q1. What is React?
Q2. What is React Component?
Ans: React components are bits of code for any specific purpose component that takes input and returns a React element that describes how a section of the UI (User Interface) should appear.
Q3. What is JSX?
Q4. What is ReactDOM?
Ans: React Dom is a simple package that provides DOM-specific methods that can be used at the top level of a web app to enable an efficient way of managing DOM elements of the web application page.
Q5. Why React is used and what it's advantages?
Ans: Too many reasons to use React Js for building User Interfaces (UI) some are.
- Easy to learn nature
- High scalability
- Increase performance
- React improves SEO performance
- React use for mobile app development
- React increases efficiency
- React ensures stable code
- React is extremely easy to write UI test cases because the virtual DOM system implemented entirely in JS.
Q6: Does ReactJS use HTML?
Ans. No, ReactJS uses JSX which is similar to HTML.
Q7: When ReactJS released?
Ans: March 2013
Q8: React has something called a state. What is it and how it is used?
Ans: In ReactJS state is a source of Data. they are objects responsible for determining components rendering and behavior.
Q9: List some features of ReactJS?
Free and Open Source
Asynchronous Functions & Generators
Usefulness of JSX
Q10. What is the main difference between createElement and cloneElement?
Ans: Create Element what React uses to create React Elements and cloneElement is basically used to clone an element and pass it new props.
Q11. What is the difference between React Native and React?
Q12 What is React Router?
Ans: React Router use to navigate the application pages when user request for some new page and information. suppose user stand on the home page now he wants to jump on about page so this think is control by react-router.
Q13 Why can’t browsers read JSX?
10. How is React different from Angular?
React vs Angular
|ARCHITECTURE||Only the View of MVC||Complete MVC|
|RENDERING||Server-side rendering||Client-side rendering|
|DOM||Uses virtual DOM||Uses real DOM|
|DATA BINDING||One-way data binding||Two-way data binding|
|DEBUGGING||Compile-time debugging||Runtime debugging|
Hello, My Name is Brijpal Sharma. I am a Web Developer, Professional Blogger and Digital Marketer from India. I am the founder of Codermen. I started this blog to help web developers & bloggers by providing easy and best tutorials, articles and offers for web developers and bloggers...
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