React Native Developer Interview Questions and Answers for Freshers

Updated 9 Oct 2024

Popular Companies

Q1. 1. What is git rebase used for? 2. What is Flipper used for? 3. What is useCallback? Explain with an example. 4. Is "let setState = useState()" valid syntax? How would you set state and print state with this sy...

Ans.

Answers to various technical questions related to React Native development.

1. Git rebase is used to reapply commits on top of another base tip. It is used to maintain a clean and linear project history.
2. Flipper is a mobile debugging tool for iOS and Android apps. It allows developers to inspect and debug their apps in real-time.
3. useCallback is a hook in React that returns a memoized callback function. It is used to optimize performance by preventing unnecessary re-renders...read more

Ans.

React Native works by running JavaScript code on a separate thread and communicating with native modules through a bridge.

React Native runs JavaScript code on a separate thread called the JavaScript thread.
It communicates with native modules through a bridge, which allows JavaScript to interact with platform-specific APIs.
The bridge passes messages between the JavaScript thread and the native modules, enabling seamless communication.
React Native uses a virtual DOM to efficien...read more

Ans.

React Native is a framework for building cross-platform mobile applications using JavaScript and React.

Allows developers to write code once and deploy it on both iOS and Android platforms
Utilizes native components for better performance and user experience
Supports hot reloading for faster development iterations