250+ React Js MCQ With Online Practice Test

React.js, often simply called React, is a highly popular JavaScript library for building user interfaces. Developed and maintained by Facebook, React is renowned for its component-based architecture and the ability to efficiently update and render components when data changes. It is a foundational tool for developing modern web and mobile applications, allowing developers to create dynamic and interactive user interfaces with ease. React's vast ecosystem, including tools like React Native for mobile app development, makes it a top choice for frontend development and a key player in the world of web technologies.

Practice Test

181. What is Server-Side Rendering (SSR) in the context of React.js?

Answer: Rendering React components on the server

182. Which key benefit of SSR can lead to improved SEO for React applications?

Answer: Search engines can index content

183. What is the main challenge of Server-Side Rendering (SSR) in React?

Answer: Limited interactivity on the client side

184. Which React library or framework facilitates Server-Side Rendering (SSR) by default?

Answer: Next.js

185. In SSR, when is the initial rendering of a React component performed?

Answer: On the server

186. What is the purpose of the hydrate() method when using SSR in React?

Answer: To start the client-side rendering

187. Which technique can be used to share data between the server and the client in SSR?

Answer: Sending data via HTTP headers

188. What is a potential drawback of Server-Side Rendering (SSR) in React?

Answer: Complexity of server setup

189. How can you implement code splitting with Server-Side Rendering (SSR) in React?

Answer: By using the import() function

190. What is the key advantage of Server-Side Rendering (SSR) for improving perceived performance?

Answer: Faster client-side rendering
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React Js Multiple Choice Questions React Js MCQ React Js Interview Questions With Answers