class One { 
 public One foo（） { return this； } 
} 
class Two extends One { 
public One foo（） { return this； } 
} 
class Three extends Two { 
 // insert method here 
} 
Which two methods， inserted individually， correctly complete the Three class？（）

A JavaBeans component has the following field： 
11. private boolean enabled； 
Which two pairs of method declarations follow the JavaBeans standard for accessing this field？（）

1. public class A { 
2. 
3. private int counter = 0； 
4. 
5. public static int getInstanceCount（） { 
6. return counter； 
7. } 
8. 
9. public A（） { 
10. counter++； 
11. } 
12. 
13. } 
Given this code from Class B： 
25.A a1 =new A（）； 
26. A a2 =new A（）； 
27. A a3 =new A（）； 
28. System.out.printIn（A.getInstanceCount（） ）；
What is the result？（） 

A programmer is designing a class to encapsulate the information about an inventory item. A JavaBeans component is needed to do this. The Inventoryltem class has private instance variables to store the item information： 
10. private int itemId； 
11. private String name； 
12. private String description； 
Which method signature follows the JavaBeans naming standards for modifying the itemld instance variable？（） 

A programmer needs to create a logging method that can accept an arbitrary number of arguments. For example， it may be called in these ways： 
logIt（”log message 1 “）； 
logIt（”log message2”，”log message3”）； 
logIt（”log message4”， “log message5”， “log message6）； 
Which declaration satisfies this requirement？（）

10. class Foo { 
11. static void alpha（） { /* more code here */ } 
12. void beta（） { /* more code here */ } 
13. } 
Which two are true？（）

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？ （）

11. public enum Title { 
12. MR（”Mr.”）， MRS（”Mrs.”）， MS（”Ms.”）； 
13. private final String title； 
14. private Title（String t） { title = t； } 
15. public String format（String last， String first） { 
16. return title + “ “ + first + “ “ + last； 
17. } 
18. } 
19. public static void main（String[] args） { 
20. System.out.println（Title.MR.format（”Doe”， “John”））； 
21. } 
What is the result？（） 

public class Ball { 
public enum Color { RED， GREEN， BLUE }； 
public void foo（） { 
// insert code here 
{ System.out.println（c）； } 
} 
} 
Which code inserted at line 14 causes the foo method to print RED， GREEN， and BLUE？（）