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QUESTION NO:40
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
Correct Answer: D
QUESTION NO:56
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.
Correct Answer: D
QUESTION NO:5
A company that makes Computer Assisted Design (CAD) software has, within its application, some utility
classes that are used to perform 3D rendering tasks. The company\’s chief scientist has just improved the
performance of one of the utility classes\’ key rendering algorithms, and has assigned a programmer to
replace the old algorithm with the new algorithm. When the programmer begins researching the utility
classes, she is happy to discover that the algorithm to be replaced exists in only one class. The
programmer reviews that class\’s API, and replaces the old algorithm with the new algorithm, being careful
that her changes adhere strictly to the class\’s API. Once testing has begun, the programmer discovers that
other classes that use the class she changed are no longer working properly. What design flaw is most
likely the cause of these new bugs?
A. Inheritance
B. Tight coupling
C. Low cohesion
D. High cohesion
E. Loose coupling
F. Object immutability
Correct Answer: B
QUESTION NO:12
Given:
11. public static void main(String[] args) {
12. Object obj = new int[] { 1, 2, 3 };
13. int[] someArray = (int[])obj;
14. for (int i : someArray) System.out.print(i ” “);
15. }
What is the result?
A. 1 2 3
B. Compilation fails because of an error in line 12.
C. Compilation fails because of an error in line 13.
D. Compilation fails because of an error in line 14.
E. A ClassCastException is thrown at runtime.
Correct Answer: A
QUESTION NO:57
Given:
5. class A {
6. void foo() throws Exception { throw new Exception(); }
7. }
8. class SubB2 extends A {
9. void foo() { System.out.println(“B “); }
10. }
11. class Tester {
12. public static void main(String[] args) {
13. A a = new SubB2();
14. a.foo();
15. }
16. }
What is the result?
A. B
B. B, followed by an Exception.
C. Compilation fails due to an error on line 9.
D. Compilation fails due to an error on line 14.
E. An Exception is thrown with no other output.
Correct Answer: D
QUESTION NO:24
A UNIX user named Bob wants to replace his chess program with a new one, but he is not sure where the
old one is installed. Bob is currently able to run a Java chess program starting from his home directory /
home/bob using the command:
java -classpath /test:/home/bob/downloads/*.jar games.Chess Bob\’s CLASSPATH is set (at login time) to:
/usr/lib:/home/bob/classes:/opt/java/lib:/opt/java/lib/*.jar
What is a possible location for the Chess.class file?
A. /test/Chess.class
B. /home/bob/Chess.class
C. /test/games/Chess.class
D. /usr/lib/games/Chess.class
E. /home/bob/games/Chess.class
F.
inside jarfile /opt/java/lib/Games.jar (with a correct manifest)
G. inside jarfile /home/bob/downloads/Games.jar (with a correct manifest)
Correct Answer: C
QUESTION NO:51
Click the Exhibit button. Which statement is true about the set variable on line 12?
A. The set variable contains all six elements from the coll collection, and the order is guaranteed to be
preserved.
B. The set variable contains only three elements from the coll collection, and the order is guaranteed to be
preserved.
C. The set variable contains all six elements from the coll collection, but the order is NOT guaranteed to
be preserved.
D. The set variable contains only three elements from the coll collection, but the order is NOTguaranteed
to be preserved.
Correct Answer: D
QUESTION NO:77
Given a valid DateFormat object named df, and
16. Date d = new Date(0L);
17. String ds = “December 15, 2004”;
18. // insert code here
What updates d\’s value with the date represented by ds?
A. 18. d = df.parse(ds);
B. 18. d = df.getDate(ds);
C. 18. try {19. d = df.parse(ds);20. } catch(ParseException e) { };
D. 18. try {19. d = df.getDate(ds);20. } catch(ParseException e) { };
Correct Answer: C
QUESTION NO:21
Given:
11. public class Yikes {
12.
13. public static void go(Long n) {System.out.print(“Long “);}
14. public static void go(Short n) {System.out.print(“Short “);}
15. public static void go(int n) {System.out.print(“int “);}
16. public static void main(String [] args) {
17. short y = 6;
18. long z = 7;
19. go(y);
20. go(z); 21. }
22. }
What is the result?
A.
int Long
B. Short Long
C. Compilation fails.
D. An exception is thrown at runtime.
Correct Answer: A
QUESTION NO:26
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”);
Correct Answer: DE
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