JavaScript Question of the Day March 13, 2025

Consider the following program:

let ball;
function main() {
    ball = new Circle(100);
    ball.setPosition(getWidth() / 2, getHeight() / 2);
    ball.setColor("red");
    add(ball);

    keyDown();
}

function keyDown() {
    keyDownMethod(changeColor);
}

function changeColor(e) {
    if (e.key == "a") {
        ball.setColor("orange");
    } else if (e.key == "b") {
        ball.setColor("black");
    }
}

main();

Once the program is running, how many times will we be able to use the key event handler and change the color of the ball?

1. Correct Answer
   Incorrect Answer
   a

   One time since the function keyDown is only called once

2. Correct Answer
   Incorrect Answer
   b

   Two times

3. Correct Answer
   Incorrect Answer
   c

   Unlimited times as long as the program is running

4. Correct Answer
   Incorrect Answer
   d

   This code does not allow us to change the color of the ball