A reference to a subclass object can be assigned to a superclass variable
A) only if neither the subclass nor the superclass is generic
B) only if at most one of the subclass and superclass is generic
C) only if the subclass is not generic
D) with no restrictions on the genericity of the subclass or superclass

Question

Quizplus · Accepted Answer

There are no restrictions on the genericity of the subclass or superclass when assigning a reference to a subclass object to a superclass variable. This is known as upcasting, and it is a common practice in object-oriented programming. It allows for increased flexibility and reusability of code. However, it is important to note that when upcasting, the methods and properties specific to the subclass will not be accessible from the superclass variable.

A Reference to a Subclass Object Can Be Assigned to a Superclass