Flutter Interview Questions

This file contains a number of Flutter interview questions.

Note: Keep in mind that many of these questions are open-ended and could lead to interesting discussions.

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Title: Flutter Interview Questions

• What is the difference between a StatelessWidget and a StatefulWidget in Flutter?
• Explain the Stateful Widget Lifecycle?
• When do you use the WidgetsBindingObserver?
• What is Flutter tree shaking?
• What is a Spacer widget?
• What is the difference between hot restart and hot reload?
• What is an InheritedWidget? List some examples.
• Why is the build() method on State and not StatefulWidgets?
• What is a pubspec file in Dart?
• How is Flutter native?
• What is a Navigator and what are Routes in Flutter?
• What is a PageRoute?
• Explain async, await and Futures.
• How can you update a ListView dynamically?
• What is a Stream?
• What are keys in Flutter and when should you use it?
• What are GlobalKeys?
• When should you use mainAxisAlignment and crossAxisAlignment?
• When can you use double.INFINITY?
• What is Ticker, Tween and AnimatedBuilder?
• What is ephemeral state?
• What is an AspectRatio widget used for?
• How would you access StatefulWidget properties from its State?
• Is there a suggested limit to the number of FloatingActionButtons a screen can have? Give a reason(s) for your answer
• Mention two or more operations that would require you to use or return a Future.
• What is the purpose of a SafeArea?
• When to use a mainAxisSize?
• SizedBox VS Container?
• List the Visibility widgets in flutter and the differences?
• Can we use Color and Decoration property simultaneously in the Container? Explain
• Inorder for the CrossAxisAlignment.baseline to work what is another property that we need to set?
• when should we use a resizeToAvoidBottomInset?
• What is the difference between 'as','show' and 'hide' in an import statement?
• What is the importance of a TextEditingController?
• Why do we use a Reverse property in a Listview?
• Difference between a Modal and Persistent BottomSheet with an example?
• How is an Inherited Widget different from a Provider?
• What is an UnmodifiableListView?
• Difference between these operators "?? and ?."
• What is the purpose of ModalRoute.of()?
• Difference between a Navigator.pushNamed and Navigator.pushReplacementNamed?
• Difference between a Single Instance and Scoped Instance ?

Title: Animation Interview Questions

• What is a vsync?
• When does the animation reach completed or dismissed status?
• Difference between `AnimationController and Animation?
• When to use a SingleTickerProviderStateMixin and TickerProviderStateMixin?
• Define a TweenAnimation ?
• State the importance of a Ticker ?
• Why do we need a mixins ?

Title: FireStore Interview Questions

• Difference between getDocuments() vs snapshots()?

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