Google Flutter Essentials 5

Question 1

Which function starts a Flutter app by inflating a widget and attaching it to the screen?

Accepted Answer

runApp()

Answer

runApp() takes the root widget and attaches it to the render tree.

Question 2

How do you navigate to a new screen using the imperative Navigator API?

Accepted Answer

Navigator.push()

Answer

Navigator.push() adds a new route onto the navigation stack.

Question 3

Which widget centers its child within itself?

Accepted Answer

Center

Answer

Center aligns its child to the middle of the available space.

Question 4

What is BuildContext primarily used for?

Accepted Answer

Locating a widget's position in the tree and accessing inherited data

Answer

BuildContext references a widget's location in the tree, used to look up ancestors like Theme.

Question 5

Which widget combines layout, painting, and positioning properties in one convenient box?

Accepted Answer

Container

Answer

Container bundles padding, margins, decoration, and sizing into a single widget.

Google Flutter Practice Test