Practice Test 5

A class analyzes a 2D array of survey ratings and wants the average per row. Consider the following Java code.

int[][] ratings = {

  {4, 5, 3},

  {2, 1, 3}

};

for (int r = 0; r < ratings.length; r++) {

  int rowSum = 0;

  for (int c = 0; c < ratings<u>r</u>.length; c++) {

    rowSum += ratings<u>r</u><u>c</u>;

  }

  System.out.print(rowSum + " ");

}

What is the output of the following nested loop?

A student is comparing each pair of names to find matching first letters. Consider the following Java code.

String[] names = {"Ava", "Ben", "Amy"};

int matches = 0;

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

  for (int j = i + 1; j < names.length; j++) {

    if (names<u>i</u>.charAt(0) == names<u>j</u>.charAt(0)) {

      matches++;

    }

  }

}

System.out.println(matches);

What is the output of the following nested loop?