申論題

第26題 Given: 10. interface Jumper{public void jump();} ... 20. class Animal{} ... 30. class Dog extends Animal{ 31. Tail tail; 32. } ... 40. class Beagle extends Dog implements Jumper{ 41. public void jump(){} 42. } ... 50. class Cat implements Jumper{ 51. public void jump(){} 52. } Which three are true? (Choose three.) (A) Cat is-a Animal (B) Cat is-a Jumper (C) Dog is-a Animal (D) Dog is-a Jumper (E) Cat has-a Animal F. Beagle has-a Tail G. Beagle has-a Jumper