Q.1. What is Flutter and why is it useful?
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| some general question and answer in flutter interview |
Ans. Flutter is a mobile app development framework created by Google. It uses the Dart programming language and provides a reactive programming model for building high-performance, expressive and beautiful mobile apps for iOS and Android. It also provides a rich set of customizable widgets and tools for building beautiful and responsive user interfaces.
Q.2. What is the difference between StatelessWidget and StatefulWidget in Flutter?
Ans. A StatelessWidget is a widget that will not change over time and will always have the same output for a given input. A StatefulWidget, on the other hand, can change over time and can have different output for the same input. A good example of a StatelessWidget is a Text widget that always displays the same text, while a good example of a StatefulWidget is a TextField widget that can change its text as the user types.
Q.3. How does Flutter differ from other cross-platform mobile development frameworks like React Native and Xamarin?
Ans. Flutter is a unique framework because it uses its own rendering engine and widgets, rather than using native widgets like React Native and Xamarin. This allows for more flexibility and control over the look and feel of the app, as well as better performance and faster development times. Additionally, Flutter's use of Dart as the programming language allows for more expressive and readable code.
Q.4. Can you explain the concept of streams in Flutter and how they are used?
Ans. A stream is a sequence of asynchronous events that can be listened to and reacted to in real-time. In Flutter, streams are used to handle real-time data, such as user input, network requests, and sensor data. The StreamBuilder widget can be used to easily build widgets that react to the data emitted by a stream.
Q.5. How do you handle state management in Flutter?
Ans. There are several ways to handle state management in Flutter, including:Using the StatefulWidget and setState method
Using ScopedModel or Bloc patternUsing Provider package The choice of method depends on the complexity and size of the project, and the specific needs of the app.
