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

141. What is the primary purpose of making HTTP requests in a React application?

Answer: To retrieve data from external APIs

142. In React, which JavaScript function is commonly used for making HTTP GET requests to retrieve data from an API?

Answer: fetch()

143. What is the purpose of the fetch() function in React when making API requests?

Answer: To retrieve data from an API

144. Which of the following HTTP methods is typically used for fetching data from an API in React?

Answer: GET

145. What does the term "API" stand for in the context of web development?

Answer: Application Programming Interface

146. In React, how do you handle asynchronous API requests to ensure that data is retrieved successfully?

Answer: By using the await keyword

147. What does an HTTP status code of "404" typically indicate when making an API request in React?

Answer: Resource not found

148. What is the purpose of the then() method when handling API responses in React using fetch()?

Answer: To handle the response data

149. In React, what is the recommended approach for handling errors when making API requests?

Answer: By using try-catch blocks

150. Which of the following data formats is commonly used for API responses that contain structured data in React?

Answer: JSON
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React Js Multiple Choice Questions React Js MCQ React Js Interview Questions With Answers