In order to determine the type that a polymorphic variable refers to, the decision is made
A) by the programmer at the time the program is written
B) by the compiler at compile time
C) by the operating system when the program is loaded into memory
D) by the Java run-time environment at run time
E) by the user at run time

Question

Quizplus · Accepted Answer

The Java run-time environment determines the type that a polymorphic variable refers to at run time through a process called dynamic binding or late binding. This allows for greater flexibility in the code and allows objects of different types to be used interchangeably in certain situations. The programmer does not explicitly determine the type, and it is not determined by the compiler or operating system. The user also does not have control over the type that a polymorphic variable refers to.

In Order to Determine the Type That a Polymorphic Variable