62. Given: 

31. class Foo{ 

32. public int a = 3； 

33. public void addFive(){ a += 5； System.out.print("f ")； } 

34. } 

35. class Bar extends Foo{ 

36. public int a = 8； 

37. public void addFive(){this.a += 5； System.out.print("b ")；} 

38. }

Invoked with: 

Foo f = new Bar()； 

f.addFive()；

 System.out.println(f. a)； 

What is the result?
(A) b 3
(B) b 8
(C) b 13
(D) f 3
(E) f 8

58. 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；

59. Given the following directory structure:   (A) If the compile is successful, Utils.class is added to the source directory. (B) The compiler returns an invalid flag error. (C) If the compile is successful, Utils.class is added to the classes directory. (D) If the compile is successful, Utils.class is added to the bigProject directory.

複選題60. Given: 1. package com.company.application； 2. 3. public class MainClass{ 4. public static void main(String[] args){} 5. } And MainClass exists in the /apps/com/company/application directory. Assume the CLASSPATH environment variable is set to "." (current directory). Which two java commands entered at the command line will run MainClass? (Choose two.) (A) java MainClass if run from the /apps directory (B) java com.company.application.MainClass if run from the /apps directory (C) java -classpath /apps com.company.application.MainClass if run from any directory (D) java-classpath . MainClass if run from the /apps/com/company/application directory (E) java -classpath /apps/com/company/application:. MainClass if run from the /apps directory

61. Given two files, GrizzlyBear.java and Salmon.java: 1. package animals.mammals； 2. 3. public class GrizzlyBear extends Bear{ 4. void hunt() { 5. Salmon s = findSalmon()； 6. s.consume()； 7. } 8. } 1. package animals.fish； 2. 3. public class Salmon extends Fish { 4. public void consume() { /* do stuff */ } 5. } If both classes are in the correct directories for their packages, and the Mammal class correctly defines the findSalmon() method, which change allows this code to compile? (A) add import animals. mammals.*； at line 2 in Salmon.java (B) add import animals.fish.*； at line 2 in GrizzlyBearjava (C) add import animals.fish.Salmon.*； at line 2 in GrizzlyBear.java (D) add import animals. mammals.GrizzlyBear*； at line 2 in Salmon.java

複選題67. Given: 10. abstract public class Employee { 11. protected abstract double getSalesAmount()； 12. public double getCommision() { 13. return getSalesAmount() * 0.15； 14. } 15. } 16. class Sales extends Employee { 17. //insert method here 18. } Which two methods, inserted independently at line 17, correctly complete the Sales class? (Choose two.) (A) double getSalesAmount() { return 1230.45； } (B) public double getSalesAmount() { return 1230.45； } (C) private double getSalesAmount() { return 1230.45； } (D) protected double getSalesAmount() { return 1230.45； }

68. Given the following six method names: addListener addMouseListener setMouseListener deleteMouseListener removeMouseListener registerMouseListener How many of these method names follow JavaBean Listener naming rules? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5

複選題69. Given 11. public interface Status { 12. /* insert code here */ int MY_VALUE = 10； 13. } Which three are valid on line 12? (Choose three.) (A) final (B) static (C) native (D) public (E) private

70.Given the fully-qualified class names: com.foo.bar.Dog com.foo.bar.blatz.Book com.bar.Car com.bar.blatz.Sun Which graph represents the correct directory structure for a JAR file from which those classes can be used by the compiler and JVM? (A) Jar A (B) Jar B (C) Jar C (D) Jar D (E) Jar E

72. Given: 1. package geometry； 2. public class Hypotenuse { 3. public InnerTriangle it = new InnerTriangle()； 4. class InnerTriangle { 5. public int base； 6. public int height； 7. } 8. } Which statement is true about the class of an object that can reference the variable base? (A) It can be any class. (B) No class has access to base. (C) The class must belong to the geometry package. (D) The class must be a subclass of the class Hypotenuse.

73. Given: 10. interface Data { public void load()； } 11. abstract class Info { public abstract void load()； } Which class correctly uses the Data interface and Info class? (A) public class Employee extends Info implements Data {public void load(){ /* do something */ } } (B) public class Employee implements Info extends Data { public void load(){ /* do something */ } } (C) public class Employee extends Info implements Data public void load(){ /* do something */ } public void Info.load(){ /* do something */ } } (D) public class Employee implements Info extends Data { public void Data.load(){ /* do something */ } public void load(){ /* do something */ } } (E) public class Employee implements Info extends Data { public void load(){ /* do something */ } public void Info.load(){ /* do something */ }