arrays

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

• a) malloc
  

• b) alloc
  

• c) new
  

• d) new malloc

2. Which of these is an incorrect array declaration?

• a) int arr[] = new int[5]
  

• b) int [] arr = new int[5]
  

• c) int arr[] = new int[5]
  

• d) int arr[] = int [5] new

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

• a) Row
  

• b) Column
  

• c) Both Row and Column
  

• d) None of the mentioned

4. Which of these is an incorrect Statement?

• a) It is necessary to use new operator to initialize an array
  

• b) Array can be initialized using comma separated expressions surrounded by curly braces
  

• c) Array can be initialized when they are declared
  

• d) None of the mentioned

5.What will be the output of the following Java code?

1. class array_output

2. {

3. public static void main(String args[])

4. {

5. int array_variable [] = new int[10];

6. for (int i = 0; i < 10; ++i)

7. {

8. array_variable[i] = i;

9. System.out.print(array_variable[i] + " ");

10. i++;

11. }

12. }

13. }

• a) 0 2 4 6 8
  

• b) 1 3 5 7 9
  

• c) 0 1 2 3 4 5 6 7 8 9
  

• d) 1 2 3 4 5 6 7 8 9 10

6.What is the index range for the elements of an array in Java? 

• a) 0 to length - 1

• b) 1 to length 

• c) -1 to length - 1 

• d) 0 to length 

7.What happens if you try to access an array element with an index that is out of bounds? 

• a) A runtime exception is thrown 

• b) The program terminates abruptly 

• c) The element value is set to null 

• d) The element value is set to 0 

8.Which method is used to copy one array into another in Java? 

• a) copy() 

• b) clone() 

   

• c) System.arraycopy() 

• d) Arrays.copy()

9.Can the length of an array be changed after its creation in Java? 

• a) Yes, by using the resize() method 

• b) Yes, by using the length property 

• c) No, the length of an array is fixed after creation 

   

• d) No, arrays in Java have a fixed length

10.How do you declare an array in Java? 

• a) int[] arr; 

• b) int arr[]; 

• c) int arr; 

• d) Array<int> arr;