Google Flutter Google Flutter State Management

Question 1

Which built-in Flutter class is the simplest way to manage local widget state?

Accepted Answer

StatefulWidget

Answer

StatefulWidget is Flutter's built-in mechanism for managing mutable local state within a widget.

Question 2

What method must you call inside a StatefulWidget to trigger a UI rebuild when state changes?

Accepted Answer

setState()

Answer

setState() marks the widget as dirty, causing Flutter to schedule a rebuild on the next frame.

Question 3

Which Flutter class allows descendant widgets to access data without passing it explicitly through constructors?

Accepted Answer

InheritedWidget

Answer

InheritedWidget propagates data down the widget tree, enabling descendants to access it via context.

Question 4

In the Provider package, which class should you extend to create a simple state object that notifies listeners?

Accepted Answer

ChangeNotifier

Answer

ChangeNotifier provides the notifyListeners() method that triggers UI rebuilds when state changes.

Question 5

What is the core concept of the BLoC pattern in Flutter?

Accepted Answer

Business logic is separated from UI using Streams

Answer

BLoC (Business Logic Component) uses Streams to separate business logic from the UI layer.

Google Flutter Practice Test