Since I was awake for baby-duty I decided to CodePen the exercise myself, along with some work-arounds using
And if you're scheduled for an interview and are all excited that you've found this 'leaked' information, I'm sorry to dash your hopes. I'm not in the driver's seat running the interviews so this isn't actually in the interview process.
Nevertheless, play around with closures. I'm sure you'll enjoy the learning process anyways!