One codebase, native feel
Flutter Interview Questions
Widgets, state, layout, platform channels and release engineering for Flutter applications.
40 questions10 easy22 medium8 hard0/40 learned
01What is Flutter and how does it render UI?Easyflutter · dart · cross-platform · rendering02Describe Flutter's architecture from framework to embedder.Mediumarchitecture · engine · embedder · rendering03How does Flutter compare with React Native?Mediumcomparison · react native · rendering · tooling04Which Dart language features matter most in Flutter work?Easydart · null safety · records · patterns05Explain the widget tree and how it updates.Easywidgets · element tree · rendering06When do you use a StatelessWidget versus a StatefulWidget?Easywidgets · state · setstate07What is BuildContext and what are its pitfalls?Mediumbuildcontext · inheritedwidget · navigation08How do keys work and when do you need them?Mediumkeys · list widgets · element identity09How do you choose a state management approach?Mediumstate management · architecture · rebuilds10Compare Provider, Riverpod and Bloc.Mediumprovider · riverpod · bloc · state management11How do Flutter's core layout widgets work together?Easylayout · container · padding · constraints12How do Row, Column, Expanded and Flexible distribute space?Mediumflex · row · column · expanded13How do you build responsive and adaptive Flutter layouts?Mediumresponsive · layoutbuilder · adaptive · breakpoints14How do navigation and routing work in Flutter?Mediumnavigation · routing · go_router · navigator15How do you build and validate forms in Flutter?Mediumforms · validation · textinput · accessibility16How do you keep long lists smooth?Mediumlists · performance · lazy loading · rebuilds17How does asynchronous programming work in Flutter?Mediumasync · await · event loop · errors18What is the difference between Future and Stream?Easyfuture · stream · streamcontroller · async19When and how do you use isolates?Hardisolates · concurrency · performance · compute20How do platform channels work and what are the failure modes?Hardplatform channels · methodchannel · pigeon · native21How do you evaluate and manage Flutter plugins?Mediumplugins · pub · dependencies · federated plugins22How do you integrate existing native code and SDKs?Hardnative integration · ffi · platform views · add-to-app23How do you build animations that stay smooth?Mediumanimations · animationcontroller · transitions24When and how would you use CustomPainter?Hardcustom painter · canvas · graphics · performance25How do you build a maintainable theme system?Easytheming · material 3 · colorscheme · dark mode26How do you localize a Flutter app?Mediumlocalization · intl · rtl · accessibility27How do you structure networking and API error handling?Mediumnetworking · http · dio · errors28How do you choose local storage in Flutter?Easystorage · shared preferences · sqlite · security29How do you design offline support and synchronization?Mediumoffline · sync · conflict resolution · caching30How do you implement push notifications reliably?Mediumpush notifications · fcm · apns · permissions31How do you implement deep links for iOS and Android?Mediumdeep links · universal links · app links · go_router32How do you plan a Flutter test strategy?Mediumtesting · unit tests · test pyramid · coverage33How do you write reliable widget tests?Mediumwidget testing · flutter_test · pump · finders34How do you run integration tests on devices?Mediumintegration testing · integration_test · ci · flakiness35How do you debug a Flutter issue efficiently?Easydebugging · devtools · logging · errors36How do you profile Flutter performance and find jank?Hardperformance · profiling · jank · devtools37How do you reduce Flutter app size?Hardapp size · obfuscation · assets · tree shaking38What does a production Flutter release build require?Hardrelease builds · signing · flavors · ci39How do you take a Flutter app through store deployment?Harddeployment · app store · play console · release40Which Flutter practices keep a codebase healthy?Easybest practices · architecture · lints · accessibility
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