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AP Computer Science a Flashcards: Array Creation And Access

Study Array Creation And Access 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 will 'arr.length' return for an array 'arr' of 5 elements?

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ANSWER
  1. Property returns total number of elements in array.

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AP Computer Science a: Data Collections

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

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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 28Practice questions for this set
A weather station stores rainfall amounts in an array. Given the code snippet, 
public class Rain {
  public static void main(String[] args) {
    double[] rain = new double[3]; // 3 days
    rain[0] = 0.2;
    rain[1] = 1.0;
    rain[2] = 0.0;
  }
}
The array stores decimal values. What data type does the array rain store?
Choose an answer

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