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Web / React native Interview questions

How different is React-native from ReactJS?

ReactJS knowledge can be leveraged for React-native however there few differences.

ReactJS is for developing web applications while React-native developing mobile applications.

We can use HTML tags in ReactJS however react native doesn't understand html tags.

In ReactJS, the virtual DOM renders the browser code, while React-native uses its API to render code for mobile applications.

ReactJS uses React-router for navigating web pages however react-native uses a built-in navigator library (React-navigation) for navigating mobile applications.

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What is React-native framework? Mention a few core components in React-native? What is JSX? What are Props in React-native? What is state in React-native components? Difference between state and props in React. What is REDUX? What is REDUX Ducks pattern? What are hooks in React/React-native? Difference between Flux and Redux. Difference between useEffect hook and useLayoutEffect. What are native apps? Benefits Of Native Mobile App Development. What is an Offline first application? What is Javascript Obfuscator? What is Component-Driven Development? What is the use of watchman for react native? What are Refs used for in React Native? What is the default value of position CSS property in react-native? What are the different ways to create React components? Difference between Functional component and class-based component in React. What is useFocusEffect hook in React navigation? What is react-navigation? What are the 2 axes of flexbox? What is marginVertical CSS property? Differentiate: ScrollView vs FlatList elements. What are the 3 fundamental principles of REDUX? Types of React navigation. Explain stack navigator in React navigation. Difference between React Native and React. What is React native elements library? Common performance issues in React native app development. What is React Native Bridge? Explain different Threads in ReactNative. What is Redux in React Native? Is there any difference between declaring a function inside or outside the component's body? Does useSelector cause a re-render of the component? When do the React components rerender? What is the first file in React applications? How different is React-native from ReactJS? What is a Flexbox? What is State and how is it used in React Native? What is flipper in React-Native? Mention the differences between redux persist and redux offline packages if you have used it. What are the Class component lifecycle methods in React? Explain useFocusEffect hook in React-native. What is Redux middleware? Have you used SafeAreaView in your react-native project? Why did you use it? Difference between useLayoutEffect and useEffect. How do I navigate to a component from middleware/component where there are no navigation props? What is the benefit of using StyleSheet vs a plain object?
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