Flutter Basics
Core Flutter concepts, widgets, lifecycle, and framework fundamentals
61
Easy Questions
91
Medium Questions
8
Hard Questions
Easy Questions (61)
Difference between flutter and react native?
flutternative
Difference between flutter getter and flutter setter
flutter
Flutter difference between (debug , release , profile )build
flutter
Flutter difference between double.infinity vs media query
flutter
Flutter difference between set state and provider ?
flutterstateprovider
Flutter difference between native development vs flutter ?
flutternative
Flutter Difference between async , await , future ?
flutterasyncfuture
What is keys in flutter and when to use key in flutter ?
flutter
What is StatefulBuilder and it’s use case (example setState)
state
in flutter using “as Map” vs using “ is Map” ? Whats the difference between them
flutter
What is obsolete files give me with some example in flutter?
flutter
What is protobuf and how we can use it with flutter ? (sample plugins protoc_plugin , protobuf)
flutter
What is Flutter SDK ? and what is the full form of SDK → ( Software Development Kit )
flutter
What is the shortcut to create flutter stateless and stateful widgets ?
flutterwidgetstate
What is the difference between main isolates and event loop in flutter ?
flutter
What is inherited widget in flutter and what are all the use cases of it
flutterwidget
Difference between InheritedWidget vs Provider vs Riverpod vs Bloc vs GetX ?
widgetblocgetxriverpodprovider
What is flutter hooks ? and how it is differ from state managements ?
flutterstate
What is the use of assert in flutter give me with some example ?
flutter
what is the different key’s in flutter and what is the use of them in different scenario provide me with some example ?
flutter
What is the use of ( universal html / html / flutter html ) - plugins ?
flutter
What is the use of RegExp in flutter provide me all the use cases that i can use this option for ?
flutter
What is the difference between hive , objectbox , sqlite database in flutter ?
flutterdatabase
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What is the use of yield in flutter proviide me with some real world example ?
flutter
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What is the difference between using navigator 1.0 vs navigator 2.0 ? why flutter brought navigator 2.0 ?
flutter
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what is the use of entity in flutter difference between using entity and models ?
flutter
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What do you mean by open-source software? Is Flutter open-source?
flutteropen-sourcebasics
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What is the purpose of the initState() method in a StatefulWidget?
widgetlifecyclestatefulwidget
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What is the purpose of the dispose() method in a StatefulWidget?
widgetlifecyclememory-management
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What technology is Flutter built with?
flutterarchitecturetechnology
In initState function in StatefulWidget in Flutter, should super.initState() be called before any function or after any function?
initstatelifecyclestatefulwidgetbest-practices
In dispose function in StatefulWidget in Flutter, should super.dispose() be called before any function or after any function?
disposelifecyclestatefulwidgetmemory-managementbest-practices
What is the difference between main() and runApp() in Flutter?
flutterdartmainrunAppentry-point
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Medium Questions (91)
Lifecycle of stateful widget and explain everything
widgetstate
Diff btw stateless and stateful widget and explain
widgetstate
Diff btw if else and switch case in flutter
flutter
Flutter is single thread or multi thread
flutter
Why materialApp widget is used in flutter ?
flutterwidget
Flutter method overriding and method overloading
flutter
Flutter method channel vs event channel
flutter
Flutter Hot restart and Hot reload
flutter
Flutter Getx vs BLOC which is better
flutterblocgetx
Flutter OOPS concept must know (refer the question number 76)
flutteroops
Flutter write a function to list prime members from 0 to 100
flutter
Flutter must know sqflite package for local storage all the interview questions asked
flutterstorage
Flutter how to change the first letter capital in all of this “Hello print my Name”; change this to “Hello Print My Name”;
flutterapi
Flutter how to change the first letter capital in all of this “Hello print my Name”; change this to “HelloprintmyName”;
flutterapi
Flutter What about the performance in flutter over native development ?
flutterperformancenative
Flutter How MVVM Architecture will looks like ?
flutterarchitecturemvvm
How Flutter Apps are converted to native apps ?
flutternative
What are all the principle in flutter and explain (example like solid principle ) ?
flutter
What is streams and how to use streams in flutter and what is types of stream in flutter ?
flutterstream
Have you used any logger plugin (flutter log handler , flog)
flutter
What are the flutter mobile app standards ?
flutter
What are the different types of architecture in flutter and benefits (feature first , layer first)
flutterarchitecture
Flutter architecture guide lines
flutterarchitecture
Essential flutter development tool in 2025
flutter
What compiler it uses in profile mode , release mode and debug mode in flutter?
flutter
**Teardown (The Hidden Cost):** Before `main()` can run again, the Flutter framework must tear down the current state (disposing of widgets, states, controllers, etc.). This cleanup process takes time and is the primary reason for extra delay.
flutterwidgetstateclean
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Check all the plugins in flutter.dev ? (optional)
flutter
When the app is in foreground notification appears at the top tapping on the notification the lifecycle state is changing from inactive to resume why? Check both in android and ios ?
stateandroidios
What is the use of didChangeMetrics ? this is in flutter lifecycle state
flutterstate
How to control the image widget taking so much ram → particularly when list of images shown example list of 1000 people profile like profile image with there names ?
widget
Without statemanagement/BLOC,riverpod like statemanagement not allow need to use native flutter any possible way to update the state of the widget or how we can develop the app without state management?
flutterwidgetstateblocriverpod
**App-wide state:** `InheritedWidget`, `InheritedNotifier`, `InheritedModel`.
widgetstate
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What if flutter secure storage and get storage already have a key in the name when you try to write the new data to that key will it overwrite or else throw error ?
flutterstorage
Diff between flutter widgetBinding and MicroTask? And architectural flow diagram how they renderer?
flutterdartmicrotaskevent-loopfuture
How to use search functionality in flutter provide me the sample code for searching in the list and providing the similar matching and exact matching data ?
flutter
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How to use state synchronization in riverpod across multiple devices in flutter ?
flutterstateriverpod
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What is deprecated how to use it with methods in flutter with sample code ?
flutter
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how to securely store the access token , refresh token or any key in android , ios device ?
androidios
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How flutter secure storage plugin stores the key in both android and iOS ?
flutterstorageandroidios
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What are all the NOSQL databases that we can use it to build flutter apps ?
flutterdatabase
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When your sharing your screen or taking screenshot of your app how to make sure privacy content or not shared or not taken screen shot in flutter ?
flutter
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What is the difference between Widget Tree vs Element Tree vs Render Object Tree in Flutter?
flutterarchitecturewidget-treeelement-treerender-object
In flutter bloc , riverpod how to handle multiple statemanagements in the single file ? Like if a single file have to use 2 or 3 riverpod providers how to handle that scenario ?
flutterstateblocriverpodprovider
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comparing to native android app , flutter app startup time is very high why how to reduce it ?
flutternativeandroid
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What is the difference between MVC, MVP, clean architecture and MVVM Architecture Pattern? and when flutter officially support mvvm architech why you choose clean architech over mvvm ?
flutterarchitecturemvcmvvmmvp
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does flutter completely depends on oops ? explain me also how java , kotlin , swift are they depends on oops ?
flutteroops
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in dispose in flutter stateful widget example the animation controller is called before the super.dispose() or after the super.dispose() ? and why ?
flutterwidgetstate
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Normal counterScreen code inside that widget add another childer which is ExpensiveWidget now instead of using setState() use any other state management to update the counter value ? because expensive widget is not needed to rebuild when the counter value is updated ?
widgetstate
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inside the Listview widget if the list.generate with 1000 items then the UI freeze why ? and how to solve this issue ?
widget
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This site consists of Difference Between MVC, MVP, and MVVM Architecture Pattern?
flutterarchitecturemvcmvvmmvp
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What is the difference between MaterialApp and WidgetsApp in Flutter?
flutterwidget
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Explain the mounted property. How is it important and when to use it?
widgetmountedstate-management
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What is the purpose of the didUpdateWidget method in a StatefulWidget?
widgetlifecyclestatefulwidget
Lifecycle of stateful widgets in Flutter?
stateful-widgetlifecyclestate-management
What is IndexedStack and what is the use of it along with BottomNavigationBar?
indexed-stackbottom-navigation-barnavigationwidgetsstate-management
In Riverpod state management, which provider should I use and when? What are Provider, FutureProvider, NotifierProvider, AsyncNotifierProvider, and StreamProvider? When should I use Riverpod annotations (@riverpod)? What are Mutations in Riverpod 3.0?
riverpodstate-managementproviderasyncnotifiernotifier
In Flutter, when using a StatefulWidget, if the device orientation changes (for example, from landscape to portrait), and we want the video to continue playing from the exact same duration, which lifecycle method of the State class should be used to handle this?
lifecycleorientationstate-managementvideo-playermediaquery
Real-world StatefulWidget lifecycle scenarios: 1) Inside widget if setState is called, which lifecycle method is called - didUpdateWidget or didChangeDependencies? 2) App is running and device theme changes (light/dark mode), which lifecycle method is called? 3) Device orientation changes, which lifecycle method? 4) Stream data updated, which lifecycle method? 5) State management (BLOC/Riverpod) state changes, which lifecycle method?
lifecyclesetStatethemeorientationstream
Dart & Flutter Control Flow and Conditional Rendering Techniques
dartfluttercontrol-flowconditional-renderingswitch
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Explain clearly about immutability vs mutability in flutter with some proper examples
dartflutterimmutabilitymutabilityconst
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Explain clearly about difference between deactivate vs dispose in lifecycle of stateful widgets in flutter with some proper examples
flutterlifecyclestateful-widgetdeactivatedispose
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Explain clearly on Skia vs Impeller rendering engine in flutter with some proper examples
flutterskiaimpellerrenderingperformance
Explain clearly on difference between flutter web vs other web development
flutterwebreactseoperformance
Hard Questions (8)
Difference between AWS - Lambda , AppSync , Cognito and what is the use of it with Flutter also compare it with Firebase ?
flutterfirebase
If the input data = “Flutter apps are so beautiful” , output data = “rettulf sppa era os lufituaeb” write a code for this input and the expected result is output data ?
flutter
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what is kotlin coroutines and what is the use of it compare it with flutter and provide me some example ?
flutter
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What is PWA and compare it with native android and flutter which is better ?
flutternativeandroid
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FLUTTER → FULL DETAILED ARCHITECTURE → flutter_app_how_running_in_android_device_detailed_architecture (Check the github - interview prep docs )
flutterandroidarchitecturegit
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Without statemangement how to create a widget with loader , show data , show error message ?
widgetstate
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What is the role of the FlutterEngine in the Flutter framework?
architectureengineadvanced