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React Native

React Native practice

Flexbox layout

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Two <View> boxes sit inside a parent <View> that has no styles. How do they line up?

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React skills, applied to native mobile

How React translates to iOS and Android — rendering to real native views (not the DOM), flexbox layout and StyleSheet (with the column-default and density-independent quirks), FlatList virtualization and list performance, the JS-vs-UI thread split that governs smoothness, and the New Architecture (JSI, Fabric, TurboModules, Hermes, Reanimated worklets). Durable concepts first; version-specific architecture is flagged. Part of the Developer track.

• Meets you at your level — never too easy, never too hard.

• Adapts every question to how you’re doing.

• Tracks your level over time. Skill practice, not a test.

New here? Read the React Native guide

A free 17-minute primer — the mental model, the mistakes beginners make, and what to practice first.

Curriculum

338 concepts across 28 chapters, from foundations through advanced practice — each one a concept the adaptive question bank can teach and test.

A. What React Native actually is

B. Core components: View, Text, Image and friends

C. TextInput and text entry

D. Touch, Pressable and the responder system

E. StyleSheet and the style system

F. Yoga layout, and where it diverges from web CSS

G. Units, density and responsive dimensions

H. Lists and virtualization

I. ScrollView, keyboard and safe area

J. Platform differences and platform-specific code

K. Animation

L. The New Architecture: Fabric, TurboModules, JSI, bridgeless

M. Hermes and the JavaScript environment

N. Native modules and native components

O. Performance

P. Debugging and developer tooling

Q. Metro, bundling and assets

R. Accessibility

S. Navigation

T. Device APIs: networking, storage, permissions and app state

U. Expo: modules, config and EAS

V. Shipping: builds, signing and upgrades

W. React hooks, as they behave in a React Native app

X. Shared state: what to reach for, and what it costs

Y. Mobile security: what the client can and cannot protect

Z. Localization and right-to-left layout

AA. Maps and device location

AB. Typing a React Native app

View the full curriculum →

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React Native on exams

React Native is one of the skills tested on this exam. Each prep page lays out what the real test covers and where this skill fits.

Mobile interview

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