100 Must-Know React Native Interview Questions and Answers 2024

React Native Fundamentals

1.
What is React Native and how does it differ from React?
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2.
Can you explain the concept of “Learn once, write anywhere” in the context of React Native?
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3.
How do you create a basic React Native application?
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4.
What are components in React Native?
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5.
Explain the purpose of the render() function in a React Native component.
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6.
What is JSX and how is it used in React Native?
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7.
Can you list some of the core components in React Native?
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8.
How do you handle state management in React Native?
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9.
What are props in React Native and how are they used?
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10.
What is the significance of the Flexbox layout in React Native?
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11.
How do you debug a React Native application?
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12.
Explain the concept of hot reloading in React Native.
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13.
How do you handle user input in React Native?
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14.
What is a TouchableHighlight in React Native?
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15.
Describe the View component and its purpose in React Native.
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16.
How would you navigate between screens in a React Native app?
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17.
Can you explain the use of the useState hook in React Native?
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18.
How do you apply styles in React Native?
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19.
What is the difference between state and props in React Native?
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20.
How do you fetch and render a list of data using React Native?
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React Native Intermediate Concepts

21.
What are the lifecycle methods of a React Native component?
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22.
Explain the use of the useEffect hook in React Native.
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23.
What are higher-order components in React Native?
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24.
How do you use the Context API in React Native?
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25.
Can you perform deep linking in React Native? If so, how?
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26.
Explain the significance of keys in a list in React Native.
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27.
How do you implement global state in a React Native app without using Redux or Context API?
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28.
How do you optimize performance in a React Native app?
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29.
What is the Virtual DOM and how does React Native utilize it?
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30.
Describe how to implement animations in React Native.
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31.
How does React Native handle layout for different device sizes and orientations?
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32.
What is the difference between StyleSheet.create and plain JavaScript objects for styling?
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33.
How do you use Redux for state management in React Native?
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34.
What is the useCallback hook and how can it be useful in React Native?
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35.
Explain how to use refs in React Native.
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36.
How would you create a custom hook in React Native?
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37.
In what ways can you improve the memory usage of a React Native app?
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38.
What is the role of the React Native Bridge?
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39.
How can you integrate a React Native app with a backend service?
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40.
How do you secure sensitive data such as API keys in a React Native app?
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React Native Styling and Layout

41.
How do you use the StyleSheet object to create styles?
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42.
Can you explain how to use Flexbox for responsive layouts in React Native?
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43.
How do you implement theming in a React Native application?
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44.
What consideration should be taken when styling components for different platforms (iOS and Android)?
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45.
How can you use third-party styling libraries like Styled Components in React Native?
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React Native Data Management and Networking

46.
How do you handle state persistence in React Native?
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47.
Explain how to make network requests using axios or fetch in React Native.
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48.
What is GraphQL and how can it be used in a React Native app?
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49.
How do you manage caching of network requests in React Native?
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50.
What are the best practices for data validation in React Native forms?
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51.
How can you integrate a React Native application with Redux Saga?
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52.
Discuss the different ways to manage application state in React Native.
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53.
How do you handle offline data synchronization in React Native?
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54.
What are the benefits of using Apollo Client in React Native applications?
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React Native Platform Specifics

55.
How does React Native handle platform-specific code?
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56.
What are some common platform-specific components in React Native?
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57.
Can you explain how to use the Platform module in React Native?
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58.
How do you build a component that renders differently on iOS and Android?
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59.
Describe a scenario where you might use NativeModules in React Native.
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60.
How do you use Linking to handle external URLs in React Native?
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React Native Performance Optimization

61.
What strategies can you employ to optimize the performance of a React Native application?
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62.
How would you reduce the app bundle size in a React Native project?
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63.
Explain how to use the PureComponent class for performance gains in React Native.
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64.
Why is it important to avoid unnecessary renders in React Native, and how can you achieve this?
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65.
What is the Hermes engine and how does it benefit React Native performance?
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React Native Testing and Debugging

66.
What are some popular testing frameworks for React Native applications?
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67.
How do you write a unit test for a React Native component?
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68.
Describe the process for end-to-end testing in React Native.
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69.
What are some common debugging techniques in React Native?
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70.
What tools would you use for performance profiling in React Native?
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React Native Navigation and Routing

71.
Compare and contrast React Navigation and React Native Navigation.
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72.
How do you pass parameters between screens using React Navigation?
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73.
Explain tab navigation in React Native.
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74.
How can you implement deep linking with React Navigation?
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75.
What is the difference between stack navigation and modal navigation in React Native?
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React Native Build and Deployment

76.
What is the process to build and package a React Native app for production?
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77.
How do you configure app signing for deploying a React Native app to the Google Play Store or Apple App Store?
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78.
Explain the steps to update a React Native app already deployed on the app stores.
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79.
What is CodePush and how can it be used in React Native apps?
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80.
How do you manage different app environments (development, staging, production) in React Native?
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React Native Ecosystem and Libraries

81.
List some common libraries that you would consider essential for React Native development.
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82.
How do you integrate a navigation library like React Navigation into a React Native app?
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83.
What is Expo, and what are its pros and cons?
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84.
How would you integrate push notifications into a React Native app?
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85.
Describe how you would use a library like React Native Elements to enhance the UI of your app.
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Advanced React Native Topics

86.
What is the Flipper tool and how does it help in React Native development?
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87.
Can you explain the use of Turbo Modules in React Native?
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88.
Describe the process of linking native modules in a React Native app.
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89.
What is Reanimated, and when would you use it in a React Native app?
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90.
How do you create a bridge for a native module in React Native?
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91.
Explain the concept of shared element transitions in React Native.
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92.
How would you go about writing native code in Swift or Kotlin for React Native?
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93.
What is “Fast Refresh” in React Native?
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94.
How does React Native compile to native code?
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95.
Can you integrate a React Native application into an existing native iOS or Android app?
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React Native Best Practices

96.
What are the best practices for structuring a large React Native codebase?
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97.
How should you handle sensitive data in a React Native app?
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98.
What are the best practices for API interaction and data fetching in React Native?
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99.
Discuss the importance of accessibility in React Native apps.
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100.
How do you ensure that your React Native application is maintainable and scalable over time?
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100 React Native interview questions

What is React Native and how does it differ from React?

Can you explain the concept of “Learn once, write anywhere” in the context of React Native?

How do you create a basic React Native application?

What are components in React Native?

Explain the purpose of the render() function in a React Native component.

What is JSX and how is it used in React Native?

Can you list some of the core components in React Native?

How do you handle state management in React Native?

What are props in React Native and how are they used?

What is the significance of the Flexbox layout in React Native?

How do you debug a React Native application?

Explain the concept of hot reloading in React Native.

How do you handle user input in React Native?

What is a TouchableHighlight in React Native?

Describe the View component and its purpose in React Native.

How would you navigate between screens in a React Native app?

Can you explain the use of the useState hook in React Native?

How do you apply styles in React Native?

What is the difference between state and props in React Native?

How do you fetch and render a list of data using React Native?

What are the lifecycle methods of a React Native component?

Explain the use of the useEffect hook in React Native.

What are higher-order components in React Native?

How do you use the Context API in React Native?

Can you perform deep linking in React Native? If so, how?

Explain the significance of keys in a list in React Native.

How do you implement global state in a React Native app without using Redux or Context API?

How do you optimize performance in a React Native app?

What is the Virtual DOM and how does React Native utilize it?

Describe how to implement animations in React Native.

How does React Native handle layout for different device sizes and orientations?

What is the difference between StyleSheet.create and plain JavaScript objects for styling?

How do you use Redux for state management in React Native?

What is the useCallback hook and how can it be useful in React Native?

Explain how to use refs in React Native.

How would you create a custom hook in React Native?

In what ways can you improve the memory usage of a React Native app?

What is the role of the React Native Bridge?

How can you integrate a React Native app with a backend service?

How do you secure sensitive data such as API keys in a React Native app?

How do you use the StyleSheet object to create styles?

Can you explain how to use Flexbox for responsive layouts in React Native?

How do you implement theming in a React Native application?

What consideration should be taken when styling components for different platforms (iOS and Android)?

How can you use third-party styling libraries like Styled Components in React Native?

How do you handle state persistence in React Native?

Explain how to make network requests using axios or fetch in React Native.

What is GraphQL and how can it be used in a React Native app?

How do you manage caching of network requests in React Native?

What are the best practices for data validation in React Native forms?

How can you integrate a React Native application with Redux Saga?

Discuss the different ways to manage application state in React Native.

How do you handle offline data synchronization in React Native?

What are the benefits of using Apollo Client in React Native applications?

How does React Native handle platform-specific code?

What are some common platform-specific components in React Native?

Can you explain how to use the Platform module in React Native?

How do you build a component that renders differently on iOS and Android?

Describe a scenario where you might use NativeModules in React Native.

How do you use Linking to handle external URLs in React Native?

What strategies can you employ to optimize the performance of a React Native application?

How would you reduce the app bundle size in a React Native project?

Explain how to use the PureComponent class for performance gains in React Native.

Why is it important to avoid unnecessary renders in React Native, and how can you achieve this?

What is the Hermes engine and how does it benefit React Native performance?

What are some popular testing frameworks for React Native applications?

How do you write a unit test for a React Native component?

Describe the process for end-to-end testing in React Native.

What are some common debugging techniques in React Native?

What tools would you use for performance profiling in React Native?

Compare and contrast React Navigation and React Native Navigation.

How do you pass parameters between screens using React Navigation?

Explain tab navigation in React Native.

How can you implement deep linking with React Navigation?

What is the difference between stack navigation and modal navigation in React Native?

What is the process to build and package a React Native app for production?

How do you configure app signing for deploying a React Native app to the Google Play Store or Apple App Store?

Explain the purpose of the `render()` function in a React Native component.

What is a `TouchableHighlight` in React Native?

What is the difference between `state` and `props` in React Native?

What is the difference between `StyleSheet.create` and plain JavaScript objects for styling?

What is the `useCallback` hook and how can it be useful in React Native?

How do you use the `StyleSheet` object to create styles?

Describe a scenario where you might use `NativeModules` in React Native.

How do you use `Linking` to handle external URLs in React Native?

Explain how to use the `PureComponent` class for performance gains in React Native.