React Native Research & Evidence-Based Practice 5 — Questions and Answers
Question 1: Evidence-based research into offline-first React Native apps identifies which library as the most mature solution for local-first data with automatic sync?
- AsyncStorage with manual sync logic
- WatermelonDB
- SQLite via expo-sqlite with custom sync
- Realm (now Atlas Device SDK) (Correct answer)
Correct answer: Realm (now Atlas Device SDK)
Realm (now Atlas Device SDK) provides built-in offline-first storage with automatic cloud sync, and is consistently cited in production case studies as the most capable offline sync solution for React Native.
Question 2: Studies on React Native app store rejection rates show that which category of issue is most frequently cited by Apple's App Review team for React Native apps?
- Poor performance compared to native apps
- Privacy labels not matching actual data collection (Correct answer)
- Use of non-public API calls made by bridge modules
- Incorrect splash screen dimensions
Correct answer: Privacy labels not matching actual data collection
Privacy Nutrition Labels introduced in iOS 14+ require accurate disclosure of all data collected, and mismatches between declared and actual data collection are the leading cause of React Native app rejections.
Question 3: Research comparing React Native and Flutter for enterprise adoption in 2023–2024 shows what primary advantage React Native retains over Flutter?
- Superior animation performance
- Better native module ecosystem and JavaScript talent pool availability (Correct answer)
- Smaller app bundle size
- Faster cold start time
Correct answer: Better native module ecosystem and JavaScript talent pool availability
React Native benefits from the massive JavaScript/React developer ecosystem, making hiring easier and enabling code sharing with web teams, which is its consistently reported enterprise adoption advantage.
Question 4: Evidence-based localization research for React Native apps recommends which library as the community standard for i18n (internationalization)?
- react-intl
- i18next with react-i18next (Correct answer)
- FormatJS
- LinguiJS
Correct answer: i18next with react-i18next
i18next paired with the react-i18next binding is the most widely adopted i18n solution in React Native community surveys, offering namespace splitting, lazy loading, and pluralization support.
Question 5: A team researches the best practice for error boundary implementation in React Native. What does the evidence show is the correct component-level approach?
- Wrap every individual component in its own error boundary
- Use a single top-level error boundary only
- Place error boundaries at feature/screen level boundaries (Correct answer)
- Error boundaries are not supported in React Native
Correct answer: Place error boundaries at feature/screen level boundaries
Placing error boundaries at the screen or feature level isolates failures to individual sections without crashing the whole app, and allows graceful fallback UI per feature area.
Question 6: Research into React Native architecture patterns shows that which pattern most effectively separates business logic from UI components for testability?
- Putting all logic in useEffect hooks inside the component
- Model-View-Presenter (MVP) or custom hooks extracting logic from components (Correct answer)
- Redux actions containing all business rules inline
- Class components with componentDidMount for all data fetching
Correct answer: Model-View-Presenter (MVP) or custom hooks extracting logic from components
Extracting business logic into custom hooks or presenter layers decouples logic from rendering, making it independently testable without mounting components.
Question 7: Empirical data from React Native community health reports shows which metric is the strongest predictor of long-term library maintainability when evaluating third-party packages?
- Total npm download count
- Number of GitHub stars
- Frequency of commits addressing issues and New Architecture (Fabric/TurboModules) compatibility (Correct answer)
- Package age (older = more stable)
Correct answer: Frequency of commits addressing issues and New Architecture (Fabric/TurboModules) compatibility
Active maintenance cadence and explicit New Architecture compatibility are the strongest evidence-based signals of a library's long-term viability as React Native's internals evolve.
React Native Research & Evidence-Based Practice 5
Evidence-based research into offline-first React Native apps identifies which library as the most mature solution for local-first data with automatic sync?