1. The keywords reserved but not used in the initial version of Java are: (A) union (B) const (C) inner (D) goto (E) boolean (F) synchronized   (B),(C) & (D)   All of these.   (C) & (E)   (A), (C) & (E)   Hint Half-n-half Clue   2. 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   (D)   (A)   (B) & (C)   (A) & (C)   Half-n-half Clue   3. Consider the following code: interface Area   Interface definition is incomplete   Method compute() in interface Area should be declared public   All of these   Method compute() in class Room should be declared public   Half-n-half Clue   4. A package is a collection of   editing tools   classes   classes and interfaces   interfaces   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. Package p1 contains the following code: package p1; public class Student   Test class is not available.   Student class is not available.   Result body is not fully defined.   Class result should be declared public.   Half-n-half Clue   7. Consider the following code: class ClassA   Will compile and run successfully   Error. ClassB does not define a no-argument constructor   Error. ClassA does not define a no-argument constructor   Error. There is no code in the class ClassB   Error. There is no code in the constructor ClassA(int x)   Half-n-half Clue