1. What is the purpose of the "Expanded" widget in Flutter's "Column" or "Row" layouts?
2. Which programming language is primarily used in Flutter?
3. What is the purpose of the "Scaffold" widget in Flutter?
4. What is a "StatelessWidget" in Flutter?
5. Which widget is used to create a scrollable list in Flutter?
6. What is the purpose of the "setState" method in Flutter?
7. Which widget is used to create a clickable button in Flutter?
8. What is the purpose of the "async" keyword in Dart?
9. In Flutter, what is the default layout orientation for the "Column" widget?
10. Which widget is used to create a bottom navigation bar in Flutter?
11. What does "Widget" mean in Flutter?
12. What is the main advantage of Flutter's "hot reload" feature?
13. Which widget is used for making HTTP requests in Flutter?
15. In Flutter, what is the purpose of the MaterialApp widget?