1. What is the output of this program?
   

   
   public class Result
       {
           public static void main(String args[])
           {
                Object o = new Object();
   	     System.out.print(o.getClass());
           }
       }
   

1. 1. class java.lang.Object

   
   
   

   2. Object

   
   
   

   3. Compilation Error

   
   
   

   4. class Object

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   class java.lang.Object

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2. Which of these methods returns the class of an object?

1. 1. WhoseClass()

   
   
   

   2. getClass()

   
   
   

   3. WhoseObject()

   
   
   

   4. Class()

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   getClass()

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3. Which of these classes encapsulate runtime state of an object?

1. 1. Cache

   
   
   

   2. Runtime

   
   
   

   3. System

   
   
   

   4. Class

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Class

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4. What is the output of this program?
   

   
   class N
      {
           int K;
   	    int L;
           N() 
           {
               K = 1;
               L = 2;
           }
      }
     public class Result 
      {
           public static void main(String args[])
           {
                N object = new N();
   	     System.out.print(object.toString());
           }
      }
   

1. 1. Compilation Error

   
   
   

   2. true

   
   
   

   3. false

   
   
   

   4. String associated with object

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   toString() is method of class Object, since it is superclass of every class, every object has this method. toString() returns the string associated with the calling object.

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5. What is the output of this program?
   

   
   public class Result 
       {
           public static void main(String args[])
           {
                Object object = new Object();
   	     System.out.print(object.getclass());
           }
       }
   

1. 1. Compilation error

   
   
   

   2. class object

   
   
   

   3. class java.lang.Object

   
   
   

   4. Runtime error

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Result.java:6: error: cannot find symbol
   System.out.print(object.getclass());
   ^
   symbol: method getclass()
   location: variable object of type Object
   1 error
   output: Compilation error

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