Google Flutter Essentials 4

Question 1

Which widget makes a long list of items scrollable and builds them lazily?

Accepted Answer

ListView.builder

Answer

ListView.builder creates items on demand, efficient for long or infinite lists.

Question 2

Which widget adds padding around its child?

Accepted Answer

Padding

Answer

Padding insets its child by the given EdgeInsets amount.

Question 3

How do you add an external package to a Flutter project?

Accepted Answer

Add it under dependencies in pubspec.yaml

Answer

Dependencies are declared in pubspec.yaml and fetched with pub get.

Question 4

Which widget overlaps children, positioning them relative to its box edges?

Accepted Answer

Stack

Answer

Stack overlays children and uses Positioned for precise placement.

Question 5

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

Accepted Answer

Forces its child to fill available space along the main axis

Answer

Expanded makes a child take up the remaining free space proportionally.

Google Flutter Practice Test