1. Consider the following code: interface Area   All of these   Interface definition is incomplete   Method compute() in interface Area should be declared public   Method compute() in class Room should be declared public   Hint Half-n-half Clue   2. We would like to make a member of a class visible in all subclasses regardless of what package they are in. Which one of the following keywords would achieve this?   private OR protected   public   protected   private   Half-n-half Clue   3. The use of protected keyword to a member in a class will restrict its visibility as follows:   Visible in all classes in the same package and subclasses in other packages.   Visible only in the class and its subclass in the same package.   Visible only inside the package.   Visible only in the class where it is declared.   Half-n-half Clue   4. Package p1 contains the following code: package p1; public class Student   Student class is not available.   Class result should be declared public.   Result body is not fully defined.   Test class is not available.   Half-n-half Clue   5. Which of the following statements about abstract methods/classes in Java are true? 1. An abstract class cannot be instantiated. 2. Constructors cannot be abstract. 3. A subclass of an abstract class must defined the abstract methods. 4. Static methods may be declared abstract.   Line 1, line 2 and line 3 only   Line 1 only   Line 1 and line 2 only   Line 2 only   All are true   Half-n-half Clue   6. Which keyword can protect a class in a package from accessibility by the classes outside the package?   protected   private   final   don't use any keyword at all (make it default)   Half-n-half Clue   7. The concept of multiple inheritance is implemented in Java by (A) extending two or more classes (B) extending one class and implementing one or more interfaces (C) implementing two or more interfaces (D) all of these   (B) & (C)   (A)   (D)   (A) & (C)   Half-n-half Clue