React Native Research & Evidence-Based Practice 4

Question 1

Evidence-based analysis of React Native CI/CD pipelines shows which service is most widely adopted for automating iOS and Android builds?

Accepted Answer

Fastlane

Answer

Fastlane automates codesigning, building, testing, and deployment for both iOS and Android and is the most widely adopted automation tool in the React Native community.

Question 2

Research on over-the-air (OTA) updates in React Native shows which service enables pushing JavaScript bundle updates without going through the App Store review process?

Accepted Answer

CodePush (App Center)

Answer

CodePush by Microsoft App Center allows teams to push JS bundle and asset updates directly to users' devices, bypassing full App Store / Play Store review cycles.

Question 3

A researcher benchmarks animation approaches in React Native. Which API is evidence-based best practice for smooth 60fps animations that run on the UI thread?

Accepted Answer

Animated API with useNativeDriver: true

Answer

Setting useNativeDriver: true offloads animation calculations to the native UI thread, bypassing the JS bridge and enabling smooth 60fps animations even when the JS thread is busy.

Question 4

Evidence from React Native community surveys consistently shows that which approach to TypeScript adoption leads to the fewest runtime type errors in large codebases?

Accepted Answer

Enabling strict mode in tsconfig.json from project start

Answer

Enabling strict mode (which activates strictNullChecks, noImplicitAny, and related flags) from project inception prevents entire classes of null/undefined runtime errors.

Question 5

Research on React Native bundle size optimization identifies which technique as most impactful for reducing the initial JavaScript bundle delivered to users?

Accepted Answer

Using inline requires (lazy loading) for non-critical modules

Answer

Inline requires defer the loading of modules until they are first used, reducing the amount of JavaScript parsed and executed at startup, which is the primary evidence-based bundle size technique.

React Native Practice Test

React Native Practice Test

React Native Research & Evidence-Based Practice 4