What is known for certain about Visualizer when a method constrains its type parameter as follows? A)Visualizer can refer to either an interface or a class B)Visualizer must refer to a class C)Visualizer must refer to an interface D)Visualizer is another generic type

Question

What is known for certain about Visualizer when a method constrains its type parameter as follows?
<E extends Visualizer>
A)Visualizer can refer to either an interface or a class
B)Visualizer must refer to a class
C)Visualizer must refer to an interface
D)Visualizer is another generic type

Quizplus · Accepted Answer

The type parameter <E extends Visualizer> constrains E to be a subtype of Visualizer, which can refer to either an interface or a class. This type parameter allows for flexibility in the types of objects that can be used with the method.

What Is Known for Certain About Visualizer When a Method