Object-oriented programming · interview question

With a superclass reference pointing to a subclass object, what prints here?

Multiple choiceHardchapter-5-curatedpremiumoopmethod-overriding

java

class SuperClass {
  void display() {
    System.out.println("SuperClass Method");
  }
}
class SubClass extends SuperClass {
  @Override
  void display() {
    System.out.println("SubClass Method");
  }
}
public class Test {
  public static void main(String[] args) {
    SuperClass obj = new SubClass();
    obj.display();
  }
}

SuperClass MethodCompile errorRuntime errorSubClass Method

Answer and explanation

Correct answer

D. SubClass Method

Why

The method in the subclass overrides the method in the superclass. When the method is called on an instance of SubClass, it uses the overridden method, resulting in 'SubClass Method' being printed.

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With a superclass reference pointing to a subclass object, what prints here?

Correct answer

Why

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