If an app needs to perform a derived-class-specific operation on a derived class object reference by a base class variable,the app must first cast the base class reference to a derived class reference through a technique known as _________.
A) downcasting
B) upcasting
C) decreasecasting
D) increasecasting

Question

Quizplus · Accepted Answer

Downcasting is the technique of casting a base class reference to a derived class reference. This is necessary when performing derived-class-specific operations on a base class object. Upcasting, on the other hand, is casting a derived class reference to a base class reference. Decreasecasting and increasecasting are not valid terms in Java.

If an App Needs to Perform a Derived-Class-Specific Operation on a Derived