Upgrade EXAM for the Sun Certified for Java Programmer.SE6.0

Exam Number/Code : 310-066
Exam Name : Upgrade EXAM for the Sun Certified for Java Programmer.SE6.0
Questions and Answers : 93 Q&As
Price:  $ 88.00

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Exam : SUN 310-066
Title : Upgrade EXAM for the Sun Certified for Java Programmer.SE6.0

1. Given:
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;
Answer:B

2. list.add("foo");
7. }
8. }
Which two code fragments, inserted independently at line 5, will compile without warnings? (Choose two.)
A.public void addStrings(List list) {B.public void addStrings(List list) {C.public void addStrings(List list) {D.public void addStrings(List list) {
Answer: BC

3. Given:
21. class Money {
22. private String country = "Canada";
23. public String getC() { return country; }
24. }
25. class Yen extends Money {
26. public String getC() { return super.country; }
27. }
28. public class Euro extends Money {
29. public String getC(int x) { return super.getC(); }
30. public static void main(String[] args) {
31. System.out.print(new Yen().getC()+ " " + new Euro().getC());
32. }
33. }
What is the result?
A.Canada
B.null Canada
C.Canada null
D.Canada Canada
E.Compilation fails due to an error on line 26.
F.Compilation fails due to an error on line 29.
Answer:E

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