Flutter is an open-source UI software development kit created by Google. It is used to develop applications for Android, iOS, Linux, Mac, Windows, Google Fuchsia, and the web from a single codebase.
What are the advantages of Flutter?
Some advantages of Flutter include:
Hot reload for fast development.
Single codebase for multiple platforms.
Expressive and flexible UI.
High performance.
Access to native features and SDKs.
Strong community support.
Explain the difference between StatelessWidget and StatefulWidget.
StatelessWidget is immutable and does not maintain state. It is used for static UI components. StatefulWidget, on the other hand, is mutable and can maintain state. It is used for dynamic UI components.
What is a Widget in Flutter?
Everything in Flutter is a widget. Widgets are the building blocks of Flutter applications, ranging from basic elements like buttons and text to complex layouts.
What is the purpose of the main() function in Flutter?
The main() function in Flutter serves as the entry point of the application. It runs first when the app is started and typically calls the runApp() function to start the app’s UI.
What is the pubspec.yaml file in Flutter?
The pubspec.yaml file is a YAML file used for configuring Flutter projects. It contains metadata about the project, such as its name, description, dependencies, and other settings.
What is a StatelessWidget and how is it different from a StatefulWidget?
StatelessWidget is a widget in Flutter that does not maintain any state. It is immutable, meaning once it is built, its properties cannot change. In contrast, StatefulWidget is a widget that can maintain state, allowing it to change appearance over time.
Explain Hot Reload in Flutter.
Hot Reload is a feature in Flutter that allows developers to quickly see the effects of code changes without restarting the entire application. It speeds up the development process by updating the UI in real-time as code changes are made.
What is a StatelessWidget and when would you use it?
StatelessWidget is a widget in Flutter that is immutable, meaning it cannot change its state after being constructed. It is used for representing UI components that do not need to change, such as static text or icons.
What are keys in Flutter and why are they important?
Keys in Flutter are used to uniquely identify widgets and maintain state when widgets are rebuilt. They are important for managing stateful widgets and optimizing performance by preserving widget instances.
