--- title: "React Native Interview Questions (2026): By Level, With Model Answers" url: https://weworkworldwide.com/react-native-developer-interview-questions/ description: "React Native interview questions for junior, mid and senior developers — the bridge, native modules, navigation and performance — with model answers and red flags." date: 2026-07-04T15:33:05+00:00 source: https://weworkworldwide.com/llms.txt --- # React Native Interview Questions (2026): By Level, With Model Answers How to use this React Native looks like React until performance and native integration bite. These questions check whether a candidate understands the mobile realities underneath. Hiring a React Native developer is easy. Telling a real one from a convincing résumé is the hard part — and it’s most of what we do. These are grouped by level, because the same question that stretches a junior is a warm-up for a senior. ## Junior React Native interview questions 0–2 years Core concepts. ### How does React Native differ from React for web? What a strong answer covers It renders to native UI components rather than the DOM, using primitives like `View` and `Text` instead of HTML. Red flag Uses `div`/`span` and web CSS mental models. ### How does styling work in React Native? What a strong answer covers A subset of CSS via JS style objects and flexbox; there is no cascade, and units are density-independent pixels. Red flag Expects full CSS including the cascade and media queries. ### What is the difference between `View`, `Text` and `ScrollView`? What a strong answer covers `View` is a container, `Text` renders text, `ScrollView` scrolls its children; text must be inside `Text`. Red flag Puts raw strings outside a `Text` component. ### When do you use `FlatList` instead of `ScrollView`? What a strong answer covers `FlatList` virtualises long lists, rendering only visible items; `ScrollView` renders everything and is only for small content. Red flag Renders a huge list in a ScrollView and it janks. ### How does navigation work? What a strong answer covers Via a library like React Navigation providing stack, tab and drawer navigators; there is no URL bar by default. Red flag Tries to route with web-style URLs. ### How do you handle platform differences? What a strong answer covers `Platform.select`, platform-specific files (`.ios/.android`), and conditionals for divergent behaviour. Red flag Assumes one implementation works identically on both. ### How do you handle images and assets? What a strong answer covers Bundled assets via `require` or remote URIs with defined dimensions; unlike web, remote images need explicit sizing. Red flag Forgets to size remote images and they don’t render. ### What is Expo? What a strong answer covers A framework and toolchain that simplifies building, running and shipping RN apps, with managed native modules. Red flag No idea what Expo provides. ## Mid-level React Native interview questions 2–5 years Native integration and state. ### What is the bridge / new architecture? What a strong answer covers Historically JS and native communicated asynchronously over a bridge; the new architecture (JSI, Fabric, TurboModules) enables faster, synchronous native calls. Red flag Unaware of how JS talks to native at all. ### How do you debug performance issues? What a strong answer covers Profile with Flipper/DevTools, reduce re-renders, virtualise lists, avoid heavy work on the JS thread, and watch bridge traffic. Red flag Blames the framework without profiling. ### How do you optimise long lists? What a strong answer covers `FlatList` with stable keys, `getItemLayout`, windowing props and memoised item components. Red flag Re-renders every row on each update. ### When do you write a native module? What a strong answer covers When you need platform APIs or performance not available in JS; you expose native code to JS via modules. Red flag Thinks everything must be pure JS. ### How do you handle offline and data persistence? What a strong answer covers Local storage (AsyncStorage/MMKV), a local database, and sync strategies with conflict handling. Red flag Assumes constant connectivity. ### How do animations work performantly? What a strong answer covers Use the native driver (or Reanimated) so animations run on the UI thread, not the JS thread. Red flag Animates on the JS thread and it stutters. ### How do you manage app state? What a strong answer covers Local state, context for small shared state, and a store (Redux/Zustand) plus a server-state layer for data. Red flag Puts everything in one global store. ### How do you handle keyboard and safe areas? What a strong answer covers `KeyboardAvoidingView` and safe-area insets so UI isn’t obscured by the keyboard or notches. Red flag Ignores notches and keyboard overlap. ## Senior React Native interview questions 5+ years Architecture and release. ### How do you structure a large RN codebase? What a strong answer covers Feature-based modules, a shared design system, typed navigation, and clear native/JS boundaries. Red flag One giant screens folder with shared mutable state. ### How do over-the-air updates work and their limits? What a strong answer covers Tools like CodePush/EAS Update push JS changes without an app-store review, but native changes still require a store release. Red flag Thinks any change can be shipped OTA. ### How do you handle the app release process? What a strong answer covers Managing builds, signing, store submissions, staged rollouts and crash monitoring for both platforms. Red flag No grasp of store review or signing. ### How do you reduce app size and startup time? What a strong answer covers Hermes engine, removing unused native modules, asset optimisation, and lazy loading heavy screens. Red flag Ships a bloated bundle with slow cold start. ### How do you diagnose native crashes? What a strong answer covers Symbolicated crash reports (Sentry/Crashlytics) and platform logs to trace native vs JS causes. Red flag Only looks at JS errors. ### What are the tradeoffs of React Native vs native? What a strong answer covers Shared code and speed of delivery vs some performance ceilings and native edge cases; justify per project. Red flag Claims RN is always as good as native. ### How does the Hermes engine help? What a strong answer covers A JS engine optimised for RN with faster startup and lower memory via bytecode precompilation. Red flag Never heard of Hermes. ### How do you keep native dependencies healthy? What a strong answer covers Manage versions carefully, test upgrades, and watch for breaking changes across iOS/Android toolchains. Red flag Upgrades blindly and breaks the native build. **Skip the screening entirely.**We vet React Native engineers so you don’t have to — embed one in your team, or have us build it. [Hire React Native developers](https://weworkworldwide.com/hire-remote-react-native-developers/)[Compare us](https://weworkworldwide.com/compare/) Build and score a full interview with our free [interview scorecard tool](https://weworkworldwide.com/developer-interview-scorecard/), browse the [full question hub](https://weworkworldwide.com/interview-questions/), or see [how we interview engineers](https://weworkworldwide.com/how-we-interview-engineers/).