6. How to copy contents of array?

1. 1. Array.copy()

   
   
   

   2. Arrays.copy()

   
   
   

   3. Collection.copy()

   
   
   

   4. System.arrayCopy()

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Arrays class contains various methods for manipulating arrays (such as sorting and searching). Array is not a valid class.

---

7. Where is array stored in memory?

1. 1. first generation memory

   
   
   

   2. stack space

   
   
   

   3. heap space and stack space

   
   
   

   4. heap space

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Array is stored in heap space.Whenever an object is created, it’s always stored in the Heap space and stack memory contains the reference to it.

---

---

8. Can you make an array volatile?

1. 1. No

   
   
   

   2. Not possible

   
   
   

   3. True

   
   
   

   4. False

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   You can only make variable pointing to array volatile. If array is changed by replacing individual elements then guarantee provided by volatile variable will not be held.

---

9. What is the output of this program?
   

   
   public class arr_output 
       {
           public static void main(String args[]) 
           {
               int arr_var[][] = {{ 1, 2, 3, 4}, { 4 , 5, 6, 7}, { 7, 8, 9, 10}};
               int sum = 0;
               for (int i = 0; i < 3; ++i)
               {
                   for (int j = 0; j <  3 ; ++j)
                   {
                       sum = sum + arr_var[i][j];
                   }
               }
               System.out.print(sum / 2);
           } 
       }
   

1. 1. 10

   
   
   

   2. 15

   
   
   

   3. 20

   
   
   

   4. 22

   
   
   

   5. 12

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   None
   Output: 22

---

---

10. How to sort an array?

1. 1. Arrays.sort()

   
   
   

   2. Array.sort()

   
   
   

   3. Collection.sort()

   
   
   

   4. System.sort()

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Arrays class contains various methods for manipulating arrays (such as sorting and searching). Array is not a valid class.

---