11. Which of these is a process of converting a simple data type into a class?

1. 1. type array

   
   
   

   2. type casting

   
   
   

   3. type conversion

   
   
   

   4. type wrapping

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   type wrapping

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12. Which of these classes is not included in java.lang?

1. 1. Class

   
   
   

   2. Byte

   
   
   

   3. Integer

   
   
   

   4. Array

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Array class is a member of java.util.

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13. What is the output of this program?
    

    class N 
        {
            int p;
            double q;
        }
        class M extends N
        {
    	int r;
        }
        public class Output 
        {
            public static void main(String args[]) 
            {
                N p = new N();
                M q = new M();
                Class object;
                object = p.getClass();
                System.out.print(object.getName());
            }
        }
    

1. 1. p

   
   
   

   2. q

   
   
   

   3. N

   
   
   

   4. M

   
   
   

   5. r

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   getClass() is used to obtain the class of an object, here ‘p’ is an object of class ‘N’. hence a.getClass() returns ‘N’ which is stored in class Class object object.

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14. Which of these class defines how the classes are loaded?

1. 1. Runtime

   
   
   

   2. ClassLoader

   
   
   

   3. Class

   
   
   

   4. System

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   ClassLoader

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15. Which of these keywords cannot be used for a class which has been declared final?

1. 1. extends

   
   
   

   2. abstract and extends

   
   
   

   3. abstract

   
   
   

   4. extends and abstract

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   A abstract class is incomplete by itself and relies upon its subclasses to provide complete implementation. If we declare a class final then no class can inherit that class, an abstract class needs its subclasses hence both final and abstract cannot be used for a same class.

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