2. Object Orientation

Question 1

Can methods and constructors be overridden or overloaded ?

Answer 1

Methods can be overridden or overloaded; constructors can be overloaded but not overridden.

Question 2

What this() and super() means (constructor context) ?

Answer 2

The first statement of every constructor must be a call either to this() (an
overloaded constructor) or to super(). The compiler will add a call to super() unless you have already put in a call to this() or super().

Question 3

Polymorphism applies for static and instance methods and variables: true of false ?

Answer 3

Polymorphism is only for instance methods, not instance variables.

Polymorphism doesn’t apply to static methods.