자격증/OCJP_ExamA

QUESTION 50

IT grow. 2018. 7. 8. 19:18
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QUESTION 50 


Given: 

1. interface Animal { void makeNoise(); } 

2. class Horse implements Animal { 

3.     Long weight = 1200L; 

4.     public void makeNoise() { System.out.println("whinny"); } 

5. } 

6.  

7. public class Icelandic extends Horse { 

8.     public void makeNoise() { System.out.println("vinny"); } 

9.     public static void main(String[] args) { 

10.         Icelandic i1 = new Icelandic(); 

11.         Icelandic i2 = new Icelandic(); 

12.         Icelandic i3 = new Icelandic(); 

13.         i3 = i1; i1 = i2; i2 = null; i3 = i1; 

14.     } 

15. } When line 14 is reached, how many objects are eligible for the garbage collector? 

 

A. 0 

B. 1 

C. 2 

D. 3 

E. 4 

F. 6 


Solution : E 

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