When I was working in C++ back in the 90s, one of my team made up a C++ test for job candidates. There were 20 questions, and most of the applicants could answer only 2 or 3 of them correctly. Every once in a while, somebody would answer all 20 correctly.
Then we had to interview him further, to make sure he wasn’t too crazy....
I've participated in many of those, I am proud to say I usually got the "no one ever finished it all before" result...
But I'm not crazy.
They used to say I wuz crazy... but I showed 'em.... I SHOWED 'EM ALL!!
I had a C+ average in college!