Google Flutter Essentials 3

Question 1

What is the key difference between StatelessWidget and StatefulWidget?

Accepted Answer

StatefulWidget can rebuild in response to changing internal state

Answer

StatefulWidget holds mutable state and can rebuild when that state changes.

Question 2

Which method triggers a rebuild of a StatefulWidget after state changes?

Accepted Answer

setState()

Answer

Calling setState() notifies the framework to rebuild the widget.

Question 3

Which widget arranges its children vertically?

Accepted Answer

Column

Answer

Column lays out its children along the vertical axis.

Question 4

Which widget arranges its children horizontally?

Accepted Answer

Row

Answer

Row lays out its children along the horizontal axis.

Question 5

Which property controls spacing of children along the main axis?

Accepted Answer

mainAxisAlignment

Answer

mainAxisAlignment positions children along the main axis of a Row or Column.

Google Flutter Practice Test