Test your tidyness - a short quiz to check your tidyverse capabilities

Over the last month I gave a tidyverse + intro to data science corporate training in a startup in Tel-Aviv. We had two groups (beginners and intermediates), and for the last assignment of the course I was aiming for a short quiz comprised of various topics which we covered during the course, such that can also be automated easily (i.e., multiple choice questions). I came up with the following quiz, which I thought would be nice to share here.