Google Flutter Google Flutter Widgets

Question 1

Which widget in Flutter is used to arrange children in a horizontal line?

Accepted Answer

Row

Answer

Row lays out its children in a horizontal array along the main axis.

Question 2

What does the Expanded widget do inside a Row or Column?

Accepted Answer

Forces a child to fill the remaining available space along the main axis

Answer

Expanded wraps a child and causes it to expand to fill available space along the main axis of a Row or Column.

Question 3

Which widget creates a scrollable list of widgets that are all constructed at once?

Accepted Answer

ListView

Answer

ListView (without a builder) constructs all its children eagerly and wraps them in a scrollable container.

Question 4

What is the purpose of the SizedBox widget?

Accepted Answer

To provide a fixed-size box or to add whitespace between widgets

Answer

SizedBox constrains its child to a specific width and height, and is also used as an empty spacer widget.

Question 5

Which widget allows you to position children at arbitrary locations within a parent?

Accepted Answer

Stack

Answer

Stack layers its children on top of each other, and Positioned can be used to place them at specific coordinates.

Google Flutter Practice Test