Multiple-Choice Quiz on Java Arrays

What is the length of the following array: byte[] data = { 12, 34, 9, 0, -62, 88 };

• 5

• 6

• 7

• 8

What is the output of the following code fragment? int[] egArray = { 2, 4, 6, 8, 10, 1, 3, 5, 7, 9 }; for (int index = 0; index < 5; index++) System.out.print(egArray[index] + " ");

• 2 4 6 8 10

• 2 4 6 8 1

• 2 4 6 8 0

• 2 4 6 8

What is the output of the following code fragment? int[] egArray = { 2, 4, 6, 8, 10, 1, 3, 5, 7, 9 }; for (int index = 0; index < egArray.length; index++) System.out.print(egArray[index] + " ");

• 2 4 6 8 10 1 3 5 7 9

• 2 4 6 8 1 3 5 7 9

• 2 4 6 8 10

• 2 4 6 8

What is the output of the following code fragment? int[] egArray = { 2, 4, 6, 8, 10, 1, 3, 5, 7, 9 }; for (int index = 0; index < egArray.length; index = index + 2) System.out.print(egArray[index] + " ");

• 2 6 10 3 7

• 2 8 10 5 9

• 2 6 10 7

• 2 8 3 7

Examine the following program fragment: int[] array = { 1, 4, 3, 6, 8, 2, 5 }; int what = array[0]; for (int index = 0; index < array.length; index++) { if (array[index] > what) what = array[index]; } System.out.println(what); What does the fragment write to the monitor?

• 1

• 5

• 8

• 6

Examine the following program fragment: int[] array = { 1, 4, 3, 6, 8, 2, 5 }; int what = array[0]; for (int index = 0; index < array.length; index++) { if (array[index] < what) what = array[index]; } System.out.println(what); What does the fragment write to the monitor?

• 1

• 5

• 8

• 0

Examine the following program fragment: int[] array = { 1, 4, 3, 6 }; int what = 0; for (int index = 0; index < array.length; index++) { what = what + array[index]; } System.out.println(what); What does the fragment write to the monitor?

• 10

• 11

• 14

• 15

Which of the following array declaration of int named img with 20 array elements?

• int img;

• int[20] img;

• new int img[20];

• int img = int[20];

• none of the above

What are the legal indexes for the array ay, given the following declaration? int[] ay = {3, 5, 7, 9};

• 0 to 3

• 1 to 4

• 0 to 4

• 1 to 3

What is the output of the following code fragment? int[] ay = {3, 5, 7, 9}; System.out.println(ay[0] + " " + ay[1]);

• 3 5

• 3 7

• 3 9

• 5 7