16. Which of these is necessary to specify at time of array initialization?

1. 1. Column

   
   
   

   2. Row

   
   
   

   3. Both Row and Column

   
   
   

   4. None of these

   
   
   

   5. NA

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   Row

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17. Which of these is an incorrect Statement?

1. 1. Array can be initialized when they are declared.

   
   
   

   2. Array can be initialized using comma separated expressions surrounded by curly braces.

   
   
   

   3. It is necessary to use new operator to initialize an array.

   
   
   

   4. None of these

   
   
   

   5. NA

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Array can be initialized using both new and comma separated expressions surrounded by curly braces example : int arr[5] = new int[5]; and int arr[] = { 0, 1, 2, 3, 4};

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18. What will this code print?
    

    
    public class array 
        {
            public static void main(String args[]) 
            {
               int arr[] = new int [7];
               System.out.print(arr);
            } 
        }
    

1. 1. [I@2a139a55

   
   
   

   2. Runtime Error

   
   
   

   3. 0 0 0 0 0 0 0

   
   
   

   4. Compilation error

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   If we trying to print any reference variable internally, toString() will be called which is implemented to return the String in following form:
   [I@2a139a55

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19. Which of these is an incorrect array declaration?
    

1. 1. int arr[] = new int[5];
      

   
   
   

   2. int arr[] = int [5] new;

   
   
   

   3. int [] arr = new int[5];

   
   
   

   4. int arr[] = new int[5];

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   Operator new must be succeeded by array type and array size.

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20. Which of these operators is used to allocate memory to array variable in Java?

1. 1. new

   
   
   

   2. new malloc

   
   
   

   3. alloc

   
   
   

   4. malloc

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Operator new allocates block of memory specified by the size of array, and gives the reference of memory allocated to the array variable.

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