Questions

You’ve had your first taste of widgets, so let’s see how much you remember about them. If you find any gaps in your knowledge, then a revisit is worth it at this stage because we will be using widgets throughout the rest of this book:

1. Explain the difference between a stateful and a stateless widget.
2. How would you trigger a rebuild of a stateful widget?
3. What is the purpose of an inherited widget?
4. Why do you sometimes need to use the Key parameter when constructing a widget?
5. What are the three places where you can retrieve images for the Image widget?
6. Name three types of buttons that are available as built-in widgets.
7. What widgets could you use to create a vertical list of widgets within the center of the screen?
8. Can you remember some of the key parameters for constructing a Scaffold widget?
9. What extra functionality does ListView have over Column?