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Flutter and React Native

Mobile App Developer

Flutter and React Native questions

16 questions on Flutter and React Native for mobile app developers, easiest first.

Easy 5

StatelessWidget or StatefulWidgeteasy
Flutter hot reload vs restarteasy
Why list items need keyseasy
Dart null-aware operatorseasy
Calling setCount twiceeasy

Medium 6

React Native New Architecturemedium
const constructors in Fluttermedium
setState called after disposemedium
FutureBuilder refetching on rebuildmedium
Listener without effect cleanupmedium
Timer counter stuck at onemedium

Hard 5

Jank when parsing a big JSONhard
Swapped Flutter tiles keep colorshard
Dart microtask and event orderhard
Animation stutters while JS is busyhard
Memoized rows still re-renderhard

More Mobile App Developer skills

Mobile app development 45 Android and Kotlin 36 Swift and iOS 21 Performance and debugging 11 System design 8 Networking 5

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