Quiz
React Native quiz: 10 questions on layout, lists, navigation, native APIs, and the platform gotchas.
React Native — track quiz
EXAMPLE
// 10 questions. Pass: >= 7. Answers at the bottom. // ===== Q1 ===== // Which is the recommended scaffolding tool for new RN apps in 2026? // A) react-native init // B) create-react-app // C) Expo CLI // D) Vite // ===== Q2 ===== // What component renders text? // A) <div>hello</div> // B) <Text>hello</Text> // C) <Label>hello</Label> // D) <span>hello</span> // ===== Q3 ===== // Flexbox default direction in RN is: // A) row // B) column // C) row-reverse // D) inherit from parent // ===== Q4 ===== // For a list of 200 items, you should use: // A) ScrollView // B) FlatList // C) View with .map() // D) <ul> // ===== Q5 ===== // Pressable vs TouchableOpacity: // A) Same component, different names // B) Pressable is modern + flexible; TouchableOpacity is legacy // C) TouchableOpacity is for Android only // D) Pressable is unsupported on iOS // ===== Q6 ===== // To make app respect safe areas (notches, status bar): // A) Use SafeAreaView from react-native-safe-area-context // B) Use a fixed top padding of 44px // C) RN handles it automatically; no extra code // D) Wrap the root in <iframe> // ===== Q7 ===== // Native modules access patterns: // A) Direct fetch() calls // B) Capacitor plugins // C) Expo modules + react-native libraries via native bridge // D) RPC over websockets // ===== Q8 ===== // Inline styles in render are bad because: // A) They don't work on iOS // B) They recreate a new object every render -> defeats perf optimisations // C) Only StyleSheet supports flexbox // D) RN refuses to render inline styles // ===== Q9 ===== // EAS Update lets you: // A) Rebuild native code remotely // B) Push JS bundle updates over the air (OTA) without store review // C) Replace the app icon dynamically // D) Bypass all app store review // ===== Q10 ===== // To debug on a real device: // A) Open Safari and use the JS console // B) Shake the device + use the dev menu / Flipper / React DevTools // C) Only simulator debugging is supported // D) Print logs to a file // ===== Answers ===== // 1. C — Expo CLI is the default; bare CLI for specific native needs // 2. B — <Text>; bare strings outside <Text> crash // 3. B — column by default (opposite of web's row) // 4. B — FlatList is virtualised; ScrollView builds all children // 5. B — Pressable handles all gesture states + accessibility // 6. A — react-native-safe-area-context provides cross-platform safe areas // 7. C — Expo modules + react-native libs via native bridge // 8. B — inline objects = new ref every render; cache in StyleSheet // 9. B — OTA JS bundle updates; native code requires a new store build // 10. B — dev menu + Flipper + React DevTools; logs in browser also // ===== Patterns ===== // - Expo + EAS for builds + OTA // - <Text> only for text; FlatList for long lists // - StyleSheet.create over inline styles // - SafeAreaView at the root // ===== Pitfalls ===== // - Strings outside <Text> -> crash // - ScrollView for long lists -> jank // - flexDirection web habits (row default) bite // - Forgetting native bridge changes need a rebuild + reinstall
Why it matters
Quiz takeaway: Expo + EAS,
Tip: Tweak the snippet with Try it Yourself », then sit the quiz at the bottom of the page.
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