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ReactJS Interviews Questions

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Q1. What is ReactJS? How is it different from other JS frameworks?

React js is javascript based UI Library developed by Facebook, to create an interactive, stateful & reusable UI components. It is one of the most popular javascript frameworks that is created for handling the presentation layer for the web and mobile apps.

React is a library focused on building UI components, that is why it is different from other JavaScript frameworks.


Q2. List some advantages of ReactJS ?

1. It increases the application’s performance.

2. It can be used on client and server side

3. Code’s readability increases, because of JSX.

4. It is easy to integrate with other frameworks such as  Angular etc

5. Using React, writing UI test cases become extremely easy because React uses virtual DOM which is JavaScript object.

6. Component and Data patterns improve readability.

7. It makes debugging your application much easier. After you installing the crom the extension. 


Q3. What are the features of React?

JSX: JSX is JavaScript syntax extension.

Components : React is all about components.

One direction flow: React implements one way data flow which makes it easy to reason about your app.