React Native Interview Questions

React Native Interview Questions

React native interview questions – A list of frequently asked React Native Interview Questions with Answers are given follow.

React Native Interview Questions

1) What is react native

React Native is an open source JavaScript framework developed by Facebook. It is used to develop a real, traditional mobile app for iOS and Android platforms. Only uses JavaScript to build a mobile application. It’s like React, which uses traditional materials instead of using web objects such as building blocks. It is a shortcut platform, which allows you to write code once and can work on any platform.

The React Native app is based on React, a JavaScript library developed by Facebook and XML-Esque markup (JSX) to create a user interface. Identifies the mobile platform rather than the browser. It saves your development time as it allows you to build applications using one-language JavaScript on both Android and iOS platforms.

2) What is JSX

JSX is a program used to embed XML in Javascript. Do not say that JSX is a language with an HTML / XML tag template with Javascript. With the help of JSX, HTML / XML can be written inside a Javascript file. JSX enables conditional supply of React elements. React includes a build step that converts JSX into a Javascript code that is ultimately used by the browser if the web app or responds to Aborigines in the event of React Native.

JSX has been added to enhance the developer experience. ReactJS provides several APIs that create HTML formats in a browser. Those APIs were difficult to use often. That’s why React JS introduced JSX and added a step-by-step guide to convert JSX into understandable platform code. With the help of JSX, we can create JavaScript to easily create HTML tags.

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3) What are props in a react component

Props are parameters used to make something you want during the creation and redesign process. Props are like the arguments passed on to the React object. For example, an image is a basic element provided by the React Native library to display an image. It adopts a system called a source that is used to control which image it produces.

By transferring different amounts of resources, one item can show a different UI and different functionality. We can therefore say that props help to use and reuse the same thing in different places. Props are set by the parent component and are fixed throughout the life cycle of the component.

4) What is state in react component

The state is the only way out of resources where we can change the object of the React. Make changes to the value of the status of the components of the partial life cycle, as opposed to programs. We should not directly change the state value of the response component. The React Framework provides a setState method in which the status of an item must be changed.

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5) Which database is best for React Native?

The most popular database for React Native is an SQLite database.

6) How do you create basic button in react native?

React native provides part of the button that indicates a specific field button. Following the example shows how we create a default default button on the React native. The platform-specific button means that the look and feel of the button will depend on whether the app is running on iOS or Android. The button section reveals two main resources: title and onPress. Title resources are used to display text on a button. onPress props the requested return when the user presses a button. This is very similar to a click-through event in a web browser. Cannot apply Button style section provided by React native.

7) What is API in react native?

An API or Application Programming Interface is a software link that allows two programs to communicate without knowing how to do it. It is sometimes thought of as an agreement, with documents representing the agreement between the two parties. For example, every time you use a mobile app like Facebook, send a message, or when you see the weather on your phone, this is an API application.

React Aborigines have used the Fetch networking API to meet our needs. Just call the URL by Download, and make requests to the server as needed. The React Native API mainly uses three life modes, namely Builder, componentDidMount, and Render.

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8) Why react native use redux?

Redux is a status container for JavaScript applications. A state-of-the-art management tool, which helps you write applications that are consistent, workable, and easy to test.

React The use of native Reedux because it allows developers to use the application status as a global state and easily interact with the world from any part of React. It can interact with any framework or library.

9) What is ListView?

ListView is a core component of React Native, which contains a list of items and displays in vertical scrollable lists.

10) What are Refs in React Native?

React refs are useful features that allow you to access DOM objects or object events directly within React. It helps in situations where you want to change the child object without using props or redesigning everything.