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Flutter interview questions

Flutter interview questions.

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  • 1.

    When to use main Axis Alignment and cross Axis Alignment?

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  • 2.

    What is Flutter?

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  • 3.

    What is the difference between Expanded and Flexible widgets?

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  • 4.

    What is the pubspec.yaml file and what does it do?

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  • 5.

    Does Flutter work like a browser? How is it different from a WebView based application?

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  • 6.

    When should you use WidgetsBindingObserver?

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  • 7.

    What is the difference between "main()" and "runApp()" functions in Flutter?

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  • 8.

    What is an App state?

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  • 9.

    What is the pubspec.yaml file and what does it do?

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  • 10.

    What are the different build modes in Flutter?

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  • 11.

    What is Dart and why does Flutter use it?

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  • 12.

    How many types of widgets are there in Flutter?

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  • 13.

    How is Flutter different from a WebView based application?

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  • 14.

    What is a "widget" and mention its importance in Flutter?

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  • 15.

    What is Fat Arrow Notation in Dart and when do you use it?

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  • 16.

    Why do we pass functions to widgets?

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  • 17.

    What is Streams in Flutter/Dart?

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  • 18.

    What is release mode and when do you use it?

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  • 19.

    Differentiate between named parameters and positional parameters in Dart?

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  • 20.

    What is the difference between Scaffold and Container in Flutter?

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  • 21.

    What is ScopedModel / BLoC Pattern?

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  • 22.

    What are Null-aware operators?

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  • 23.

    What is profile mode and when do you use it?

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  • 24.

    What are packages and plugins in Flutter?

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  • 25.

    Do you know what Ephemeral state means?

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  • 26.

    Explain the different types of Streams?

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  • 27.

    Explain Navigator Widget and its push pop functions in Flutter?

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  • 28.

    How do you check if an async void method is completed in Dart?

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  • 29.

    Where are the layout files? Why doesn’t Flutter have layout files?

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  • 30.

    What are some pros of Flutter?

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  • 31.

    Why is the build() method on State and not Stateful Widget?

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  • 32.

    What are keys in Flutter and when to use it?

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  • 33.

    Differentiate StatelessWidget and StatefulWidget?

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  • 34.

    How is InheritedWidget different from Provider?

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  • 35.

    Differentiate between required and optional parameters in Dart

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  • 36.

    Differentiate between Hot Restart and Hot Reload?

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  • 37.

    What is debug mode and when do you use it?

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  • 38.

    When do we use double.INFINITY?

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  • 39.

    How to declare async function as a variable in Dart?

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  • 40.

    How is whenCompleted() different from then() in Future?

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  • 41.

    Name some cons of using Flutter?

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  • 42.

    How would you execute code only in debug mode?

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  • 43.

    How to duplicate repeating items inside a Dart list?

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  • 44.

    How to get difference of lists in Flutter/Dart?

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  • 45.

    What does "non-nullable by default" mean in Dart?

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  • 46.

    What is the difference between React Native and Flutter in-depth?

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  • 47.

    Explain async, await in Flutter/Dart?

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  • 48.

    What is the difference between double.INFINITY and MediaQuery?

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  • 49.

    What is Future in Flutter/Dart?

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  • 50.

    What is the purpose of SafeArea in Flutter?

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  • 51.

    What does a class with a method named ._() mean in Dart/Flutter?

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  • 52.

    When would you use App state or Ephemeral state over another?

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  • 53.

    What is a difference between these operators "?? and ?."

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  • 54.

    What is a MediaQuery in Flutter and when do we use it?

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  • 55.

    Why is exit(0) not preferred for closing an app?

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  • 56.

    What are Global Keys?

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  • 57.

    How does Dart AOT work?

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  • 58.

    What's the difference between async and async* in Dart?

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  • 59.

    What are some pros and cons of Scoped Model vs BLoC and vice versa?

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  • 60.

    What are the similarities and differences of Future and Stream?

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  • 61.

    Why should you use kReleaseMode instead of assert?

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  • 62.

    How to compare two dates that are constructed differently in Dart?

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  • 63.

    How do you convert a List into a Map in Dart?

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  • 64.

    Why Are StatefulWidget and State Separate Classes?

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  • 65.

    What is the difference between debug mode and profile mode?

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  • 66.

    Explain Stateful Widget Lifecycle in details

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  • 67.

    How is AnimationController different from Timer?

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  • 68.

    List some approaches for State management in Flutter

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34 Microservices interview questions and answers for software engineers

Microservice architecture – a variant of the service-oriented architecture structural style – arranges an application as a collection of loosely coupled services. In a microservices architecture, services are fine-grained and the protocols are lightweight. Here is a list of coding intervie...

. Microservices
7 Layering & Middleware interview questions for developers

Middleware in the context of distributed applications is software that provides services beyond those provided by the operating system to enable the various components of a distributed system to communicate and manage data. Middleware supports and simplifies complex distributed application...

. Layering & Middleware
55 Docker interview questions and answers for software engineers

Docker is a set of platform as a service products that use OS-level virtualization to deliver software in packages called containers. Here is a list of coding interview questions on Docker to help you get ready for your next data structures interview in 2021.

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23 Databases interview questions and answers for software engineers

A database is an organized collection of data, generally stored and accessed electronically from a computer system. Where databases are more complex they are often developed using formal design and modeling techniques. Here is a list of coding interview questions on Databases to help you g...

. Databases
21 Concurrency interview questions and answers for software engineers

In computer science, concurrency is the ability of different parts or units of a program, algorithm, or problem to be executed out-of-order or in partial order, without affecting the final outcome. Here is a list of coding interview questions on Concurrency to help you get ready for your n...

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13 CAP Theorem interview questions and answers for software engineers

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. CAP Theorem
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