1. Consider the following code: class ClassA   Error. ClassA does not define a no-argument constructor   Error. There is no code in the constructor ClassA(int x)   Error. ClassB does not define a no-argument constructor   Error. There is no code in the class ClassB   Will compile and run successfully   Hint Half-n-half Clue   2. The use of protected keyword to a member in a class will restrict its visibility as follows:   Visible only in the class where it is declared.   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.   Half-n-half Clue   3. 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   4. Which of the following are not keywords? (A) NULL (B) implements (C) protected (D) extended (E) string   (A), (D) & (E)   (D)   (C), (D) & (E)   (D) & (E)   Half-n-half Clue   5. Which of the following defines a legal abstract class?   abstract class Vehicle {<br>               abstract void display(); {<br>                 System.out.println("Car"); }}   abstract class Vehicle {<br>               abstract void display(); }   class abstract Vehicle {<br>               abstract void display(); }   class Vehicle {<br>               abstract void display(); }   abstract Vehicle {<br>               abstract void display(); }   Half-n-half Clue   6. 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)   (B) & (C)   (A) & (C)   (A)   Half-n-half Clue   7. Consider the following code: interface Area   All of these   Method compute() in interface Area should be declared public   Method compute() in class Room should be declared public   Interface definition is incomplete   Half-n-half Clue