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WithoutBook LIVE Mock Interviews React Native Related interview subjects: 20

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Know the top React Native interview questions and answers for freshers and experienced candidates to prepare for job interviews.

Total 26 questions Interview Questions and Answers

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Know the top React Native interview questions and answers for freshers and experienced candidates to prepare for job interviews.

Interview Questions and Answers

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Freshers / Beginner level questions & answers

Ques 1

What is React Native?

React Native is a JavaScript framework for building mobile applications using React. It allows developers to use React to build mobile apps for iOS and Android platforms.

Example:

import React from 'react';
import { Text, View } from 'react-native';

const App = () => {
  return (
    
      Hello, React Native!
    
  );
};

export default App;
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Ques 2

Explain the difference between React and React Native.

React is a JavaScript library for building user interfaces, primarily for web applications, while React Native is a framework for building mobile applications using React for iOS and Android platforms.
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Ques 3

What is JSX in React Native?

JSX (JavaScript XML) is a syntax extension for JavaScript used with React Native. It allows developers to write HTML-like code in their JavaScript files.

Example:

Hello, JSX!
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Ques 4

What are Props in React Native?

Props (short for properties) are a mechanism to pass data from a parent component to a child component in React Native. They are immutable and used to customize the child component.

Example:

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Ques 5

What is the purpose of 'setState' in React Native?

'setState' is used in React Native to update the state of a component. It triggers a re-render of the component and its children with the updated state.

Example:

const handleClick = () => {
  setState({ count: count + 1 });
};
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Ques 6

What is the purpose of 'StyleSheet' in React Native?

'StyleSheet' is used to define styles in a React Native app. It provides an abstraction that enables better performance by allowing the framework to optimize the styling.

Example:

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
});
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Ques 7

What is the purpose of 'Touchable' components in React Native?

Touchable components like TouchableOpacity and TouchableHighlight provide a way to capture touches or clicks on a component. They are used to make elements interactive.

Example:

 alert('Button pressed!')}>
  Press me
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Ques 8

What is the purpose of the 'ActivityIndicator' component in React Native?

The 'ActivityIndicator' component is used to show a loading indicator in a React Native app. It visually indicates that something is happening in the background.

Example:

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