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.

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

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 */ }

複選題74. Which two classes correctly implement both the java.lang.Runnable and the java.lang.Cloneable interfaces? (Choose two.) (A) public class Session implements Runnable, cloneable { public void run()； public Object clone()； } (B) public class Session extends Runnable, Cloneable { public void run(){/* do something */} public Object clone(){/* make a copy */} } (C) public class Session implements Runnable, Cloneable { public void run(){/* do something */} public Object clone() {/* make a copy */} } (D) public abstract class Session implements Runnable, Cloneable { public void run(){/* do something */} public Object clone(){/* make a copy */} } (E) public class Session implements Runnable, implements Cloneable { public void run(){/* do something */} public Object clone() {/* make a copy */} }

75. Given: 11. public interface A{ public void m1()； } 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.

76. 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.

77. 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.

79. Given classes defined in two different files: 1. package packageA； 2. public class Message{ 3. String getText(){return "text"；} 4. } And: 1. package packageB； 2. public class XMLMessage extends packageA .Message{ 3. String getText(){return "＜msg＞text＜/msg＞"；} 4. public static void main(String[] args) { 5. System.out.println(new XMLMessage().getText())； 6. } 7. } What is the result of executing XMLMessage.main? (A) text (B) Compilation fails. (C) ＜msg＞text＜/msg＞ (D) An exception is thrown at runtime.