Sun 310-066 Exam - Cheat-Test.com

Free 310-066 Sample Questions:

1. Given:
11. public class Test {
12. public enum Dogs {collie, harrier, shepherd};
13. public static void main(String [] args) {
14. Dogs myDog = Dogs.shepherd;
15. switch (myDog) {
16. case collie:
17. System.out.print("collie ");
18. case default:
19. System.out.print("retriever ");
20. case harrier:
21. System.out.print("harrier ");
22. }
23. }
24. }
What is the result?
A.harrier
B.shepherd
C.retriever
D.Compilation fails.
E.retriever harrier
F.An exception is thrown at runtime.
Answer: D

2. 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

3. Click the Task button.

Place the code elements into the class so that the code compiles and prints "Run. Run. doIt." in exactly that order. Note that there may be more than one correct solution.
Answer:

4. 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

5. Given:
3. import java.util.*;
4. public class Hancock {
5. // insert code here
6. 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: B, C

6. Click the Exhibit button.
10. interface Foo {
11. int bar();
12. }
13.
14. public class Beta {
15.
16. class A implements Foo {
17. public int bar() { return 1; }
18. }
19.
20. public int fubar( Foo foo ) { return foo.bar(); }
21.
22. public void testFoo() {
23.
24. class A implements Foo {
25. public int bar() { return 2; }
26. }
27.
28. System.out.println( fubar( new A() ) );
29. }
30.
31. public static void main( String[] argv ) {
32. new Beta().testFoo();
33. }
34. }
Which three statements are true? (Choose three.)
A.Compilation fails.
B.The code compiles and the output is 2.
C.If lines 16, 17 and 18 were removed, compilation would fail.
D.If lines 24, 25 and 26 were removed, compilation would fail.
E.If lines 16, 17 and 18 were removed, the code would compile and the output would be 2.
F.If lines 24, 25 and 26 were removed, the code would compile and the output would be 1.
Answer: B, E, F

7. Given:
1. class TestA {
2. public void start() { System.out.println("TestA"); }
3. }
4. public class TestB extends TestA {
5. public void start() { System.out.println("TestB"); }
6. public static void main(String[] args) {
7. ((TestA)new TestB()).start();
8. }
9. }
What is the result?
A.TestA
B.TestB
C.Compilation fails.
D.An exception is thrown at runtime.
Answer: B

8. Given:
11. public interface A111 {
12. String s = "yo";
13. public void method1();
14. }
17. interface B { }
20. interface C extends A111, B {
21. public void method1();
22. public void method1(int x);
23. }
What is the result?
A.Compilation succeeds.
B.Compilation fails due to multiple errors.
C.Compilation fails due to an error only on line 20.
D.Compilation fails due to an error only on line 21.
E.Compilation fails due to an error only on line 22.
F.Compilation fails due to an error only on line 12.
Answer: A

9. Given:
11. public interface A { public void m1(); }
12.
13. class B implements A { }
14. class C implements A { public void m1() { } }
15. class D implements A { public void m1(int x) { } }
16. abstract class E implements A { }
17. abstract class F implements A { public void m1() { } }
18. abstract class G implements A { public void m1(int x) { } } What is the result?
A.Compilation succeeds.
B.Exactly one class does NOT compile.
C.Exactly two classes do NOT compile.
D.Exactly four classes do NOT compile.
E.Exactly three classes do NOT compile.
Answer: C

10. Given:
11. public class Ball{
12. public enum Color { RED, GREEN, BLUE };
13. public void foo(){
14. // insert code here
15. { System.out.println(c); }
16. }
17. }
Which code inserted at line 14 causes the foo method to print RED, GREEN, and BLUE?
A.for( Color c : Color.values() )
B.for( Color c = RED; c <= BLUE; c++ )
C.for( Color c ; c.hasNext() ; c.next() )
D.for( Color c = Color[0]; c <= Color[2]; c++ )
E.for( Color c = Color.RED; c <= Color.BLUE; c++ )
Answer: A