Answer the following statements true (T) or false (F)

Question

1) Polymorphism helps promote software extensibility.
2) If a derived class reference is assigned to a base class variable, the
variable must be cast back to the derived class before any derived class methods can be called with it.
3) The abstract methods and properties of a class do not provide an
implementation.
4) Concrete classes provide implementations for every method and property
they define.

Answer 1

1) T
2) T
3) T
4) T