React native fresher interview questions with answers

Here are some React Native fresher interview questions with answers:

1. What is React Native?

React Native is a framework for building native mobile apps using JavaScript. It uses React, a popular JavaScript library for building user interfaces, to create a consistent user experience across platforms.

2. What are the benefits of using React Native?

There are many benefits to using React Native, including:

• Cross-platform: React Native apps can be built for both Android and iOS using the same code base. This can save time and money in development.
• Performance: React Native apps can be very performant, thanks to the use of the React virtual DOM.
• Community: React Native has a large and active community, which means there are many resources available to help developers learn and use React Native.

3. What are the limitations of using React Native?

There are a few limitations to using React Native, including:

• Learning curve: React Native can have a steep learning curve, especially for developers who are new to React.
• Dependencies: React Native has a number of dependencies, which can make it difficult to set up and use.
• Not a complete framework: React Native is a framework, not a complete solution. This means that developers may need to use additional libraries or tools to build a complete app.

4. What are the different components of a React Native app?

The main components of a React Native app are:

• Views: Views are the building blocks of a React Native app. They are used to render UI elements, such as text, images, and buttons.
• States: States are used to store data that changes over time. For example, the state of a button might change when the user clicks on it.
• Events: Events are used to respond to user input. For example, an event might be fired when the user clicks on a button.

5. How does React Native work?

React Native uses a bridge to communicate between JavaScript and native code. The bridge allows JavaScript to access native APIs, such as the camera and the accelerometer.

6. What are some of the most popular React Native libraries?

Some of the most popular React Native libraries include:

• React Navigation: React Navigation is a library for managing navigation in React Native apps.
• Redux: Redux is a state management library for React Native apps.
• React Native Gesture Handler: React Native Gesture Handler is a library for handling gestures in React Native apps.

7. What are some tips for writing efficient React Native code?

Here are a few tips for writing efficient React Native code:

• Use the virtual DOM: The virtual DOM can help to improve the performance of React Native apps by only updating the parts of the UI that need to be updated.
• Use functional components: Functional components are more efficient than class components. Functional components do not have a lifecycle, which can improve performance.
• Use memoization: Memoization can be used to cache the results of expensive calculations. This can improve performance by avoiding the need to recalculate the results of expensive calculations every time they are needed.
• Use lazy loading: Lazy loading can be used to load components only when they are needed. This can improve performance by avoiding the need to load components that are not needed.

These are just a few of the React Native fresher interview questions that you may be asked. By preparing for these questions, you can increase your chances of success in your next React Native interview.