單項(xiàng)選擇題

public class CreditCard {
private String cardlD；
private Integer limit；
public String ownerName；
public void setCardlnformation（String cardlD，
String ownerName， 28. Integer limit） {
this.cardlD = cardlD；
this.ownerName = ownerName；
this.limit = limit；
}
}
Which is true？（）

A. The class is fully encapsulated.
B. The code demonstrates polymorphism.
C. The ownerName variable breaks encapsulation.
D. The cardlD and limit variables break polymorphism.
E. The setCardlnformation method breaks encapsulation.

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單項(xiàng)選擇題

10. interface Foo {}
11. class Alpha implements Foo {}
12. class Beta extends Alpha {}
13. class Delta extends Beta {
14. public static void main（ String[] args） {
15. Beta x = new Beta（）；
16. // insert code here
17. }
18. }
Which code， inserted at line 16， will cause a java.lang.ClassCastException？（）

A. Alpha a = x；
B. Foo f= （Delta）x；
C. Foo f= （Alpha）x；
D. Beta b = （Beta）（Alpha）x；

多項(xiàng)選擇題

31. // some code here
32. try {
33. // some code here
34. } catch （SomeException se） {
35. // some code here
36. } finally {
37. // some code here
38. }
Under which three circumstances will the code on line 37 be executed？（）

A. The instance gets garbage collected.
B. The code on line 33 throws an exception.
C. The code on line 35 throws an exception.
D. The code on line 31 throws an exception.
E. The code on line 33 executes successfully.

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31. // some code here 32. try { 33. // some code here 34. } catch （SomeException se） { 35. // some code here 36. } finally { 37. // some code here 38. } Under which three circumstances will the code on line 37 be executed？（）

31. // some code here
32. try {
33. // some code here
34. } catch （SomeException se） {
35. // some code here
36. } finally {
37. // some code here
38. }
Under which three circumstances will the code on line 37 be executed？（）