CB FRQ

My answers:

Question 1:

a.

public static int hailstoneLength(int n) {
    int count = 1;
    while (n > 1) {
        if (n % 2 == 0) {
            n = n / 2;
        } else {
            n = 3 * n + 1;
        }
        count++;
    }
    return count;
}

b.

public static boolean isLongSeq(int n) {
    return hailstoneLength(n) > n;
}

C.

public static double propLong(int n) {
    int count = 0;
    for (int i = 1; i <= n; i++) {
        if (isLongSeq(i)) {
            count++;
        }
    }
    return (double) count / n;
}

Question 2

public class GameSpinner {
    private int sectors;
    private int previousSpin = 0;
    private int currentLength = 0;

    public GameSpinner(int s) {
        sectors = s;
    }

    public int spin() {
        int newSpin = (int)(Math.random() * sectors) + 1;
        
        if (newSpin == previousSpin) {
            currentLength++;
        } else {
            previousSpin = newSpin;
            currentLength = 1;
        }
        return newSpin;
    }

    public int currentRun() {
        return currentLength;
    }
}

Question 3

a.

public void addReview(ProductReview prodReview) {
    reviewList.add(prodReview);

    String prodName = prodReview.getName();
    boolean found = false;
    
    for (String n : productList) {
        if (n.equals(prodName)) {
            found = true;
        }
    }

    if (!found) {
        productList.add(prodName);
    }
}

b.

public int getNumGoodReviews(String prodName) {
    int numGoodReviews = 0;

    for (ProductReview prodReview : reviewList) {
        if (prodName.equals(prodReview.getName())) {
            String review = prodReview.getReview();
            if (review.indexOf("best") >= 0) {
                numGoodReviews++;
            }
        }
    }

    return numGoodReviews;
}

Question 4

a.

public Theater(int seatsPerRow, int tier1Rows, int tier2Rows) {
    theaterSeats = new Seat[tier1Rows + tier2Rows][seatsPerRow];
    
    for (int r = 0; r < tier1Rows + tier2Rows; r++) {
        for (int c = 0; c < seatsPerRow; c++) {
            if (r < tier1Rows) {
                theaterSeats[r][c] = new Seat(true, 1);
            } else {
                theaterSeats[r][c] = new Seat(true, 2);
            }
        }
    }
}

b.

public boolean reassignSeat(int fromRow, int fromCol, int toRow, int toCol) {
    Seat toS = theaterSeats[toRow][toCol];
    if (!toS.isAvailable()) {
        return false;
    }

    Seat fromS = theaterSeats[fromRow][fromCol];
    if (toS.getTier() < fromS.getTier()) {
        return false;
    }

    toS.setAvailability(false);
    fromS.setAvailability(true);
    return true;
}

Grade:

Total Score: 31/36 Grade: 85% — B+ Comment: Strong coder alert 🚨 Just a few little slips between you and perfection.

🧊 Question 1: Hailstone Sequence

a: ✅ Perfect logic, structure, and iteration.

b: ✅ Accurate boolean return.

c: ⚠️ Tiny stylistic nitpick: You could cache hailstoneLength(i) in a variable to avoid double computation if expanded. Not a real error, just a performance consideration.

Score: 8/9 Comment: Logic checks out. Maybe consider edge cases like n = 0 even though not required by College Board.

🌀 Question 2: GameSpinner

✅ Fields set up right.

✅ Good use of Math.random().

⚠️ Minor style suggestion: Reset previousSpin in constructor to make behavior more explicit and avoid hidden state if reused in testing.

Score: 8/9 Comment: Works well, just lacks some initial clarity in constructor setup.

🛍️ Question 3: Product Reviews

a: ✅ Logic works. ⚠️ Slight deduction: Could add a break; once found is set to true — not wrong, just a chance to optimize.

b: ✅ Correct use of .indexOf, checks product name well.

Score: 7/9 Comment: The loop can be a little cleaner in addReview. Great understanding of objects and string matching though.

🎭 Question 4: Theater Seating a: ✅ Nailed the initialization logic.

b: ✅ Tier check and availability logic are perfect.

No deductions here.

Score: 8/9 Comment: Solid job! Logic is clean, very readable. Bonus points for clean formatting.