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AP Computer Science a Flashcards: Nested Iteration

Study Nested Iteration in AP Computer Science a with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is the purpose of nested iteration in array processing?

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ANSWER

To iterate over multi-dimensional arrays. Outer loop accesses rows, inner loop accesses columns of 2D arrays.

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AP Computer Science a: Selection and Iteration

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What this deck covers

This deck focuses on Nested Iteration, giving you a quick way to review the definitions, rules, and examples that matter most for AP Computer Science a.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 25Practice questions for this set
A student models a pixel-art image as a 2D array of ints. Given the program below, 
int[][] img = {
  {1, 0, 1},
  {1, 1, 0}
};
int count = 0;
for (int r = 0; r < img.length; r++) {
  for (int c = 0; c < img[r].length; c++) {
    if (img[r][c] == 1) count++;
  }
}
System.out.print(count);
What is the output of the following nested loop?
Choose an answer

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