Flutter_Questions.md

List of Questions:

1. Security Guidelines:

   • What are the best practices for security in Flutter applications?
   • How does SecureStorage work in Flutter for sensitive data storage?
   • What are the differences between SSL and TSL, and how do they relate to HTTP and REST API security?

2. Why Flutter?

   • What are the advantages of choosing Flutter for app development?
   • How does Flutter's cross-platform capabilities impact development efficiency?

3. Hot Restart and Hot Reload:

   • What is the difference between hot restart and hot reload in Flutter?
   • How does Flutter manage hot reload without losing the app's state?

4. Stateless vs Stateful Widgets:

   • What is the key difference between stateless and stateful widgets in Flutter?
   • When should you use a StatelessWidget versus a StatefulWidget?

5. Widget Lifecycle:

   • What are the different stages in the widget lifecycle in Flutter?
   • What is the didChangeDependencies() method in Flutter, and when is it called?

6. Build Context:

   • What is the purpose of the BuildContext in Flutter?
   • How does BuildContext help manage widget hierarchies?

7. Inheritance and Dart:

   • Does Flutter support multiple inheritance? If not, what are the alternatives?
   • How do mixins in Dart differ from traditional classes?

8. Private Members in Dart:

   • How do you declare private members in a Dart class?
   • What is the convention for naming private members in Dart?

9. Main Method & runApp:

   • What happens if you do not call runApp(MaterialApp()) in the main() method of a Flutter app?

10. Mixins vs Classes:

    • What are the differences between using a mixin and a class in Dart?
    • When should you prefer a mixin over a class in Flutter development?

11. Required Annotation in Dart:

    • What is the purpose of the required annotation in Dart, and how does it improve code safety?

12. String Interpolation:

    • What is string interpolation in Dart, and why is it preferred over traditional string concatenation?

13. Expanded and Flexible Widgets:

    • What is the difference between the Expanded and Flexible widgets in Flutter, and when should each be used?

14. Spacer vs SizedBox:

    • What is the difference between the Spacer and SizedBox widgets in Flutter?

15. ListView vs ListView.builder:

    • What is the difference between ListView and ListView.builder in Flutter?
    • When should you use one over the other?

16. State Management Patterns:

    • What are the different state management patterns supported in Flutter?
    • What is the difference between BLoC, GetX, and Provider for state management?

17. BLoC in Flutter:

    • What is buildWhen in BLoC, and how does it control widget rebuilding?
    • What are the differences between BlocProvider, BlocConsumer, BlocListener, and BlocBuilder in Flutter?

18. Routing in Flutter:

    • How do you define routes in a Flutter application?

19. Unit Testing and Mocking:

    • Which libraries are commonly used for unit testing and mocking in Flutter?

20. Const vs Final:

    • What is the difference between const and final in Dart regarding compile-time and run-time values?
    • Can final variables in Dart be null?

21. Fat Arrow Notation in Dart:

    • What is the purpose of fat arrow (=>) notation in Dart, and when should it be used?

22. Navigator 2.0:

    • What are the differences between Navigator 1.0 and Navigator 2.0 in Flutter for managing navigation?

23. Isolates in Flutter:

    • What are isolates in Flutter, and how do they handle concurrency?

24. Concurrent Futures:

    • How do you run multiple futures concurrently using await Future.wait in Dart?

25. RenderFlex Overflow:

    • How do you handle the error "A RenderFlex overflowed by N pixels on the bottom"?

26. Call Method in Dart Classes:

    • What is the call method in Dart classes, and how does it allow class instances to emulate functions?

27. Build Modes in Flutter:

    • What are the different build modes in Flutter (debug, release, profile)?
    • How does tree-shaking work in Flutter builds?

28. Debugging Broken UI:

    • How do you debug a broken UI and find the root cause using debugFillProperties?

29. Streams in Flutter:

    • What are Streams in Flutter, and how are they used for asynchronous data handling?

30. Widget Tree, Element Tree, Renderer Tree:

    • What are the Widget Tree, Element Tree, and Renderer Object Tree in Flutter, and how do they relate to the rendering process?

31. Orientation Handling in Flutter:

    • How do you handle orientation changes for portrait and landscape mode in Flutter?

32. SOLID Principles:

    • How do the SOLID principles apply to Flutter app architecture?

33. Flutter Plugins:

    • How do you publish a Flutter plugin using flutter packages pub publish --dry-run and flutter packages pub publish?

34. Non-functional Requirements:

    • What are some common non-functional requirements for a Flutter app?

35. Why Riverpod?:

    • Why is Riverpod considered better than other state management options like Provider?

36. HTTP Streaming Drawbacks:

    • What are some of the potential drawbacks of HTTP streaming in Flutter?

37. Event Loop in Dart:

    • How does the event loop work with asynchronous operations in Dart, especially with async and await?

38. Post-Deployment Issues:

    • What are some ways to detect and resolve issues after deploying a Flutter app?

39. Benchmarking and Analytical Tools:

    • How do you use benchmarking and analytical tools in Flutter to assess performance?

40. Null Safety in Dart:

    • What is null safety in Dart, and how does it prevent null reference errors?

41. Default Values in Dart Functions:

    • How do you provide default values for parameters in Dart functions?

42. Dart's Optional Named and Positional Parameters:

    • What is the difference between optional named and positional parameters in Dart?

43. GlobalKeys in Flutter:

    • What is a GlobalKey, and how is it used to access the state of widgets?

44. Flutter's GestureDetector:

    • What is the GestureDetector widget in Flutter, and how does it handle touch events?

45. AsyncSnapshot in Flutter:

    • What is AsyncSnapshot in Flutter, and how is it used with FutureBuilder and StreamBuilder?

46. Error Handling in Dart:

    • How do you handle errors in Dart, and what is the difference between try-catch and try-catch-finally?

47. Implicit Animations in Flutter:

    • What are implicit animations in Flutter, and how do widgets like AnimatedContainer work?

48. Flutter’s ShaderMask:

    • What is ShaderMask in Flutter, and how can you use it for gradient effects?

49. Difference Between RawPointerEvent and Gesture in Flutter:

    • What is the difference between a RawPointerEvent and a gesture in Flutter?

50. CustomPainter in Flutter:

    • How do you use the CustomPainter class to create custom graphics in Flutter?

51. How to Use Flutter Hooks:

    • What are Flutter Hooks, and how do they help in managing state more efficiently?

52. Flutter's Draggable and DragTarget:

    • How do you implement drag-and-drop functionality using Draggable and DragTarget widgets?

53. FutureBuilder vs StreamBuilder:

    • What is the difference between FutureBuilder and StreamBuilder, and when should you use each?

54. How to Use AnimationController in Flutter:

    • How does the AnimationController class work in Flutter for building custom animations?

55. Flutter Web Support:

    • What are the key differences between developing for mobile and the web in Flutter?

56. Accessibility in Flutter:

    • How do you ensure accessibility in Flutter apps, especially for screen readers and keyboard navigation?

57. Asset Management in Flutter:

    • How do you manage assets (images, fonts, etc.) in a Flutter application, and what is the purpose of the pubspec.yaml file?

58. Flutter's Hero Animation:

    • What is a Hero animation in Flutter, and how does it enable shared element transitions between screens?

59. Platform Channels in Flutter:

    • What are platform channels in Flutter, and how do they facilitate communication between Flutter and native code?

60. Memory Management in Flutter:

    • How is memory managed in a Flutter app, and what tools can be used to detect memory leaks?