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Q41. Given:

1. class Alligator {

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

3. int []x[] = {{1,2}, {3,4,5}, {6,7,8,9}};

4. int [][]y = x;

5. System.out.println(y[2][1]);

6. }

7. }

What is the result?

A. 2

B. 3

C. 4

D. 6

E. 7

F. Compilation fails.

Answer: E


Q42. Given:

11. Float pi = new Float(3.14f);

12. if (pi > 3) {

13. System.out.print("pi is bigger than 3. ");

14. }

15. else {

16. System.out.print("pi is not bigger than 3. ");

17. }

18. finally {

19. System.out.println("Have a nice day.");

20. }

What is the result?

A. Compilation fails.

B. pi is bigger than 3.

C. An exception occurs at runtime.

D. pi is bigger than 3. Have a nice day.

E. pi is not bigger than 3. Have a nice day.

Answer: A


Q43. DRAG DROP

Click the Task button.

Answer:


Q44. A programmer has an algorithm that requires a java.util.List that provides an efficient implementation of add (0, object), but does NOT need to support quick random access. What supports these requirements?

A. java.util.Queue

B. java.util.ArrayList

C. java.util.LinearList

D. java.util.LinkedList

Answer: D


Q45. A developer is creating a class Book, that needs to access class Paper. The Paper class is deployed in a JAR named myLib.jar. Which three, taken independently, will allow the developer to use the Paper class while compiling the Book class? (Choose three.)

A. The JAR file is located at $JAVA_HOME/jre/classes/myLib.jar.

B. The JAR file is located at $JAVA_HOME/jre/lib/ext/myLib.jar..

C. The JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/

myLib.jar/Paper.class.

D. The JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/

myLib.jar.

E. The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac -cp /foo/myLib.jar/

Paper Book.java.

F. The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac -d /foo/myLib.jar

Book.java

G. The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac -classpath /foo/

myLib.jar Book.java

Answer: BDG


Q46. Given:

22. StringBuilder sb1 = new StringBuilder("123");

23. String s1 = "123";

24. // insert code here

25. System.out.println(sb1 + " " + s1);

Which code fragment, inserted at line 24, outputs "123abc 123abc"?

A. sb1.append("abc"); s1.append("abc");

B. sb1.append("abc"); s1.concat("abc");

C. sb1.concat("abc"); s1.append("abc");

D. sb1.concat("abc"); s1.concat("abc");

E. sb1.append("abc"); s1 = s1.concat("abc");

F. sb1.concat("abc"); s1 = s1.concat("abc");

G. sb1.append("abc"); s1 = s1 + s1.concat("abc");

H. sb1.concat("abc"); s1 = s1 + s1.concat("abc");

Answer: E


Q47. DRAG DROP

Click the Task button.

Answer:


Q48. 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


Q49. Click the Exhibit button. What is the output if the main() method is run?

A. 4

B. 5

C. 8

D. 9

E. Compilation fails.

F. An exception is thrown at runtime.

G. It is impossible to determine for certain.

Answer: D


Q50. Given:

11. public class Commander {

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

13. String myProp = /* insert code here */

14. System.out.println(myProp);

15. }

16. }

and the command line: java -Dprop.custom=gobstopper Commander Which two, placed on line 13, will

produce the output gobstopper? (Choose two.)

A. System.load("prop.custom");

B. System.getenv("prop.custom");

C. System.property("prop.custom");

D. System.getProperty("prop.custom");

E. System.getProperties().getProperty("prop.custom");

Answer: DE