React Native Concepts and Features

React Native allows developers to use JavaScript and React to build apps for iOS, Android, and the web from a single codebase. It differs from earlier methods like using WebView by utilizing native components for a more authentic experience. Developers can leverage their existing React skills to create native apps without needing to learn Java or Objective C. React Native supports platform-specific designs and offers access to native features through a robust open-source community. It can be integrated with existing projects, providing flexibility in app development.

What is the primary language used in React Native for building apps?

• JavaScript

• Java

• Swift

• Python

What was the main challenge with using Apache Cordova and Adobe PhoneGap for mobile app development?

• Lack of community support

• Limited platform compatibility

• High cost of development

• Difficulty in achieving a native feel

How does React Native differ from traditional web development using React DOM?

• It uses HTML for UI components

• It is only for Android development

• It uses native components instead of HTML

• It requires knowledge of Java or Objective-C

What is the philosophy of React Native regarding code reusability?

• Code once, deploy everywhere

• Learn once, write anywhere

• Write once, run anywhere

• Develop once, use everywhere

Which component is considered the most fundamental in React Native?

• Switch

• Button

• View

• ScrollView

How are styles applied to components in React Native?

• Using a style prop with JavaScript

• Using inline styles

• Using CSS files

• Using external style libraries

What feature allows developers to see code changes instantly in React Native?

• Live Reload

• Hot Module Replacement

• Fast Refresh

• Instant Update

Which of the following is NOT a native feature that can be accessed using React Native?

• Device Camera

• Database Management

• Push Notifications

• Geolocation

What is the role of the open-source community in React Native development?

• Providing paid support services

• Developing proprietary tools

• Limiting access to native features

• Creating packages for additional features

What is the purpose of frameworks like Expo in the React Native ecosystem?

• To offer a paid alternative to React Native

• To replace React Native

• To provide additional tooling for app deployment

• To limit app functionality