Google Flutter Google Flutter Animations

Question 1

Which class in Flutter is the foundation for all animation objects and holds a value that changes over time?

Accepted Answer

Animation<double>

Answer

AnimationController

Answer

Tween

Answer

CurvedAnimation

Question 2

What is the primary purpose of an AnimationController in Flutter?

Accepted Answer

To control the playback, duration, and direction of an animation

Answer

To define the start and end values of an animation

Answer

To apply easing curves to an animation

Answer

To rebuild the widget tree on every animation frame

Question 3

Which widget automatically rebuilds itself whenever an Animation's value changes?

Accepted Answer

AnimatedBuilder

Answer

AnimatedContainer

Answer

AnimationBuilder

Answer

AnimatedWidget

Question 4

What does a Tween<double>(begin: 0.0, end: 1.0).animate(controller) return?

Accepted Answer

An Animation<double>

Answer

A Tween object

Answer

An AnimationController

Answer

A CurvedAnimation

Question 5

Which Curve constant produces an animation that overshoots the target and then settles back?

Accepted Answer

Curves.elasticOut

Answer

Curves.easeIn

Answer

Curves.bounceOut

Answer

Curves.elasticIn

Question 6

What must you always call on an AnimationController when the owning State object is disposed?

Accepted Answer

controller.dispose()

Answer

controller.stop()

Answer

controller.reset()

Answer

controller.forward()

Question 7

Which mixin should a State class use to provide a vsync to an AnimationController?

Accepted Answer

SingleTickerProviderStateMixin

Answer

AutomaticKeepAliveClientMixin

Answer

WidgetsBindingObserver

Answer

RestorationMixin