Computer Science A

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Week 19 2024 FRQ 2

2024 FRQ 2

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FRQ Question

This question involves a scoreboard for a game. The game is played between two teams who alternate turns so that at any given time, one team is active and the other team is inactive. During a turn, a team makes one or more plays. Each play can score one or more points and the team’s turn continues, or the play can fail, in which case no points are scored and the team’s turn ends. The Scoreboard class, which you will write, is used to keep track of the score in a game.

The Scoreboard class contains a constructor and two methods.

  • The constructor has two parameters. The first parameter is a String containing the name of team 1, and the second parameter is a String containing the name of team 2. The game always begins with team 1 as the active team.
  • The recordPlay method has a single nonnegative integer parameter that is equal to the number of points scored on a play or 0 if the play failed. If the play results in one or more points scored, the active team’s score is updated and that team remains active. If the value of the parameter is 0, the active team’s turn ends and the inactive team becomes the active team. The recordPlay method does not return a value.
  • The getScore method has no parameters. The method returns a String containing information about the current state of the game. The returned string begins with the score of team 1, followed by a hyphen (“-“), followed by the score of team 2, followed by a hyphen, followed by the name of the team that is currently active.

Use Case Examples

Statement Value Returned (blank if none) Explanation
String info;
Scoreboard game =
new Scoreboard("Red", "Blue");		   game is a new Scoreboard for a game played between team 1, whose name is “Red”, and team 2, whose name is “Blue”. The active team is set to team 1.
info = game.getScore(); “0-0-Red”  
game.recordPlay(1);   Team 1 earns 1 point because the game always begins with team 1 as the active team.
info = game.getScore(); “1-0-Red”  
game.recordPlay(0);   Team 1’s play failed, so team 2 is now active.
info = game.getScore(); “1-0-Blue”  
info = game.getScore(); “1-0-Blue” The score and state of the game are unchanged since the last call to getScore.
game.recordPlay(3);   Team 2 earns 3 points.
info = game.getScore(); “1-3-Blue”  
game.recordPlay(1);   Team 2 earns 1 point.
game.recordPlay(0);   Team 2’s play failed, so team 1 is now active.
info = game.getScore(); “1-4-Red”  
game.recordPlay(0);   Team 1’s play failed, so team 2 is now active.
game.recordPlay(4);   Team 2 earns 4 points.
game.recordPlay(0);   Team 2’s play failed, so team 1 is now active.
info = game.getScore(); “1-8-Red”  
Scoreboard match =
new Scoreboard("Lions", "Tigers");		   match is a new and independent Scoreboard object.
info = match.getScore(); “0-0-Lions”  
info = game.getScore(); “1-8-Red”  

Code Runner Challenge

Create Your Own Scoreboard Class

View IPYNB Source 
// CODE_RUNNER: Create Your Own Scoreboard Class

// Create the Scoreboard Class HERE

class Scoreboard {
    // Define your properties HERE

    public Scoreboard(String team1Name, String team2Name) {
        // This is your CONSTRUCTOR
        // Initialize your properties HERE (team names and active team)
    }

    public void recordPlay(int points) {
        // Create the recordPlay Method HERE
    }

    public String getScore() {
        // Create the getScore Method HERE

        return ""; // Modify this return statement to return the actual score with the given format
    }
}

// Testing the Scoreboard class (DO NOT MODIFY this part unless you change the class, method, or constructer names)
// DO NOT MODIFY BELOW THIS LINE
class Main {
    public static void main(String[] args) {
        String info;

        // Step 1: Create a new Scoreboard for "Red" vs "Blue"
        Scoreboard game = new Scoreboard("Red", "Blue");

        // Step 2
        info = game.getScore();                  // "0-0-Red"
        System.out.println("(Step 2) info = " + info);

        // Step 3
        game.recordPlay(1);

        // Step 4
        info = game.getScore();                  // "1-0-Red"
        System.out.println("(Step 4) info = " + info);

        // Step 5
        game.recordPlay(0);

        // Step 6
        info = game.getScore();                  // "1-0-Blue"
        System.out.println("(Step 6) info = " + info);

        // Step 7 (repeated call to show no change)
        info = game.getScore();                  // still "1-0-Blue"
        System.out.println("(Step 7) info = " + info);

        // Step 8
        game.recordPlay(3);

        // Step 9
        info = game.getScore();                  // "1-3-Blue"
        System.out.println("(Step 9) info = " + info);

        // Step 10
        game.recordPlay(1);

        // Step 11
        game.recordPlay(0);

        // Step 12
        info = game.getScore();                  // "1-4-Red"
        System.out.println("(Step 12) info = " + info);

        // Step 13
        game.recordPlay(0);

        // Step 14
        game.recordPlay(4);

        // Step 15
        game.recordPlay(0);

        // Step 16
        info = game.getScore();                  // "1-8-Red"
        System.out.println("(Step 16) info = " + info);

        // Step 17: Create an independent Scoreboard
        Scoreboard match = new Scoreboard("Lions", "Tigers");

        // Step 18
        info = match.getScore();                 // "0-0-Lions"
        System.out.println("(Step 18) match info = " + info);

        // Step 19: Verify the original game is unchanged
        info = game.getScore();                  // "1-8-Red"
        System.out.println("(Step 19) game info = " + info);
    }
}

Main.main(null);
Lines: 1 Characters: 0
Output
Click "Run" in code control panel to see output ...

Expected Outputs

Step Printed Output
Step 2 (Step 2) info = 0-0-Red
Step 4 (Step 4) info = 1-0-Red
Step 6 (Step 6) info = 1-0-Blue
Step 7 (Step 7) info = 1-0-Blue
Step 9 (Step 9) info = 1-3-Blue
Step 12 (Step 12) info = 1-4-Red
Step 16 (Step 16) info = 1-8-Red
Step 18 (Step 18) match info = 0-0-Lions
Step 19 (Step 19) game info = 1-8-Red

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