Same here and same level. I'll also state that (before I quit counting) 20 out of 22 front end candidates that required "some knowledge of T-SQL" didn't have a clue. And, no... this isn't a new phenomena... this has been going on for a decade of interviews. Really, really sad state for the community at large here in SE Michigan. As I've said in many previous posts, I originally started asking the question because it was a ridiculously simple question that I thought would help break the ice and set candidates at ease a little bit. I had no idea that it would become a defining litmus-strip test of how the rest of the interview was going to go.
Shifting gears and if you want to have some fun on an interview when asked the "Manhole Cover" question, rattle off all the answers and then ask the interviewer "Which shape also has a consistent diameter but is not round and why would you use it as a manhole cover"? Eat your heart out, Google Interviewers. 😉