11. What is the output of this program?
    

    
    public class Result
      {
          public static void main(String[]args)
          {
              String[] array = { "for", "tea", "too" };
              String num= (array.length > 2) ? array[2]: null;
          }
      }
    

1. 1. The variable num is set to elements[0].

   
   
   

   2. The variable num is set to null

   
   
   

   3. An exception is thrown at run time

   
   
   

   4. Compilation error

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   The value at the 0th position will be assigned to the variable num.

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12. What is the output of this program?
    

    
    public class stringClass_Example
        {
            public static void main(String args[])
            {
                String str = "Interview";
                String str1 = "Mania";   
                String str2 = "Interview";
                System.out.println(str.equals(str1) + " " + str.equals(str2));
            }
        }
    

1. 1. true true

   
   
   

   2. false false

   
   
   

   3. false true

   
   
   

   4. true false

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   equals() is method of class String, it is used to check equality of two String objects, if they are equal, true is retuned else false.
   output: false true

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13. Which of these keywords is used to refer to member of base class from a subclass?

1. 1. this

   
   
   

   2. upper

   
   
   

   3. super

   
   
   

   4. static

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Whenever a subclass needs to refer to its immediate superclass, it can do so by use of the keyword super.

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14. Which of the following statements are incorrect?

1. 1. Java defines a peer class of String, called StringBuffer, which allows string to be altered

   
   
   

   2. Every string is an object of class String

   
   
   

   3. String is a class

   
   
   

   4. Strings in java are mutable

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Strings in Java are immutable that is they can not be modified.

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15. Which of these method of String class can be used to test to strings for equality?

1. 1. equal()

   
   
   

   2. equals()

   
   
   

   3. isequal()

   
   
   

   4. isequals()

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   equals()

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