Documentation with Comments Practice Test

What is the purpose of the comments in the provided StudentRecord code snippet?

In the StudentRecord code below, what information do the inline comments provide in this program?

import java.util.ArrayList;
import java.util.List;

/**
 * Maintains quiz scores and computes an average.
 * Demonstrates how inline comments can justify small design choices.
 */
public class StudentRecord {
    private final List<Integer> quizScores = new ArrayList<>();

    /**
     * Adds a quiz score from 0 to 10.
     *
     * @param score the quiz score
     * @return true if the score is stored
     */
    public boolean addQuizScore(int score) {
        if (score < 0 || score > 10) {
            // Enforce the stated scale so the average remains interpretable.
            return false;
        }
        quizScores.add(score);
        return true;
    }

    /**
     * Computes the arithmetic mean of stored quiz scores.
     *
     * @return the average, or 0.0 if no scores exist
     */
    public double averageScore() {
        if (quizScores.isEmpty()) {
            // Avoid dividing by zero when no scores have been added.
            return 0.0;
        }

        int sum = 0;
        for (int score : quizScores) {
            // Accumulate the total to compute the mean in one pass.
            sum += score;
        }
        return (double) sum / quizScores.size();
    }
}