Let Dog be a subclass of Animal, and suppose Animal has a method called speak() that is overridden in the Dog class. Consider the following code. Animal spot = new Dog();
Spot.speak();

Which of the following is true?
A) This code will result in a compile-time error.
B) This code will result in a run-time error.
C) The speak method defined in the Animal class will be called.
D) The speak method defined in the Dog class will be called.
E) The speak method will not be called at all.

Question

Let Dog be a subclass of Animal, and suppose Animal has a method called speak() that is overridden in the Dog class. Consider the following code. Animal spot = new Dog();
Spot.speak();

Which of the following is true?
A) This code will result in a compile-time error.
B) This code will result in a run-time error.
C) The speak method defined in the Animal class will be called.
D) The speak method defined in the Dog class will be called.
E) The speak method will not be called at all.

Quizplus · Accepted Answer

The speak method defined in the Dog class will be called in this case. At run-time, the Java virtual machine determines that spot is pointing to an object of type Dog and binds the method to the methods defined in the Dog class.

Let Dog Be a Subclass of Animal, and Suppose Animal