A、 Has-a relationships should never be encapsulated.

B、 Has-a relationships should be implemented using inheritance.

C、 Has-a relationships can be implemented using instance variables.

D、 Is-a relationships can be implemented using the extends keyword.

E、 Is-a relationships can be implemented using the implements keyword.

F、 An array or a collection can be used to implement a one-to-many has-a relationship.

G、 The relationship between Movie and Actress is an example of an is-a relationship.