React Native test

The React Native test evaluates the candidate’s ability to develop mobile applications using React Native, a popular framework that enables cross-platform development with JavaScript and React. The test begins by assessing the candidate’s understanding of basic React Native components, such as `View`, `Text`, `Image`, `TextInput`, and others, which are essential for constructing mobile user interfaces. Candidates must demonstrate their ability to create layouts, apply styles using React Native's `StyleSheet`, and handle responsive design for different screen sizes.

A critical area in React Native development is navigation. The test evaluates candidates’ knowledge of React Navigation, a widely used library for managing screen transitions and routing in mobile apps. Candidates should be able to set up stack, tab, or drawer navigation, manage navigation parameters, and handle deep linking effectively.

State management is another key aspect of React Native applications. Candidates should demonstrate proficiency with React's state management system, including using `useState` and `useEffect` hooks to manage local state and side effects within components. Additionally, the test assesses knowledge of advanced state management solutions like Redux or the Context API, which are important for handling global state in larger, more complex applications.

Interacting with device APIs is also tested. Candidates should show their ability to handle permissions, access features like the camera and geolocation, and work with local storage, enabling the development of rich and functional mobile experiences that integrate seamlessly with native mobile features.

Performance optimization is an essential part of mobile app development. Candidates should understand techniques like lazy loading, memoization, and efficient rendering using React Native’s built-in optimization tools to handle large data sets or complex animations without compromising app performance.

Error handling and debugging skills are key, with candidates expected to be familiar with error boundaries and tools like React Native Debugger, Chrome Developer Tools, and Flipper for diagnosing and fixing issues.

The test also covers the process of building and deploying mobile apps to iOS and Android platforms. Candidates should know how to build apps for both environments, configure native modules, and use services like Expo to streamline development.

Finally, candidates are expected to have experience testing React Native applications using libraries like Jest and React Native Testing Library, ensuring that components and functionality work as expected across both platforms.