Nested Iteration Practice Test

A student prints coordinates for seats in a small theater using nested loops. Given the program below,

for (int r = 1; r <= 2; r++) {

  for (int c = 1; c <= 3; c++) {

    System.out.print("(" + r + "," + c + ")");

  }

}

What is the output of the following nested loop?

A student compares two nested-loop versions for checking all pairs of items in an array. Consider the following Java code.

int n = 100;

int[] a = new int<u>n</u>;

int checks = 0;

for (int i = 0; i < n; i++) {

  for (int j = 0; j < n; j++) {

    checks++;

  }

}

System.out.print(checks);

How does the nested iteration in this code affect performance?