Arrays

What is the output for the following code fragment?

       int [ ] a = new int [5];

       a[0] = 5;

       a[1] = 4;

       a[2] = 3;

       System.out.print(a[0] + a[1] + a[4]);

• 9

• 5 4 3

• 5 4 0

• 8

What number is in matrix[2][2]?

      int [ ] [ ] matrix = { {1, 2, 3, 4},

                                    {5, 6, 7, 8},

                                    {9, 10, 11, 12},

                                    {13, 14, 15, 16}

                                  };

• 6

• 11

• 15

• 10

What is the output of the following code fragment?

      int [ ] items = {2, 7, 3, 5, 8, 9};

      int funny = items[0];

      for (int i = 0; i < items.length; i++)

      {  

            if (items[ i ] > funny)

                       funny = items[ i ];

      }

      System.out.print(funny);   

• 1,2,3,4,5,6,7,8,9

• 7,9

• 1

• 9

What is the output of the following code fragment?

     int [ ] evens = {2, 4, 6, 8, 10};

     evens[0] = 44;

     evens[4] = evens[2];

     System.out.println(evens[0] + "  " + evens[4]);

• 44 10

• 2 10

• 44 6

• 0 0

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

• 0 to length-1

• 0 to length

• -1 to length

• 1 to length

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

• Malloc

• realloc

• new

• new malloc

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

• row

• column

• both

• none

What will be the output of the following Java code? 

    class array_output

    {

        public static void main(String args[])

        {

            int array_variable [] = new int[10];

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

            {

                array_variable[i] = i;

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

                i++;

            }

        }

    }

• 1 2 3 4 5 6 7 8 9 10

• 0 2 4 6 8

• 1 3 5 7 9

• 0 1 2 3 4 5 6 7 8

What will be the output of the following Java code? 

    class multidimention_array

    {

        public static void main(String args[])

        {

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

            arr[0] = new int[1];

            arr[1] = new int[2];

            arr[2] = new int[3];              

            int sum = 0;

            for (int i = 0; i < 3; ++i)

                for (int j = 0; j < i + 1; ++j)

                    arr[i][j] = j + 1;

            for (int i = 0; i < 3; ++i)

                for (int j = 0; j < i + 1; ++j)

                    sum + = arr[i][j];

            System.out.print(sum);      

        }

    }

• 11

• 10

• 13

• 14

What will be the output of the following Java code?

    class evaluate

    {

        public static void main(String args[])

            {

                int arr[] = new int[] {0 , 1, 2, 3, 4, 5, 6, 7, 8, 9};

                int n = 6;

                n = arr[arr[n] / 2];

                System.out.println(arr[n] / 2);

            }

    }

• 3

• 1

• 0

• 6