Quiz: How good are you at C# code review?
medium.com
medium.com
I mostly do spot those types of errors in real-life code reviews, but often I have more time to do so.
I think the 1 minute time limit is too short, it should be 2-3 minutes to be fair.
Also, there were at least 3 questions I knew where the bug was, but there were several places in the code this could have been indicated and I clicked on what seemed logical to me but the "correct" answer was an adjacent code.