SCJP題庫第032題

1. class Mammal{}

2.

3. class Raccoon extends Mammal {

4. Mammal m = new Mammal();

5. }

6.

7. class BabyRaccoon extends Mammal{}

Which four statements are true? (Choose four.)

A. Raccoon is-a Mammal.

B. Raccoon has-a Mammal.

C. BabyRaccoon is-a Mammal.

D. BabyRaccoon is-a Raccoon.

E. BabyRaccoon has-a Mammal.

F. BabyRaccoon is-a BabyRaccoon.

Ans:A B C  F

解說:

Raccoon 浣熊

Mammal哺乳類動物