We used to call it the elevator test: can a candidate navigate the elevator and make it to the interview. Partly because we got ghosted a few times, but mostly

We used to call it the elevator test: can a candidate navigate the elevator and make it to the interview. Partly because we got ghosted a few times, but mostly for the number of interviews where we'd sit candidates in front of a PC, show them some code in the language we were advertising for, and say "add a trivial function". Make a button show some text level. The failure rate was a bit terrifying for "2-5 years experience with X" programmers. I stopped bothering with questions before that point, I'd read their application, look at their resume, then get them in to play with a computer. The good news is that it actually found the people we needed, the bad news is we never found an effective way to pre-filter the ones who couldn't (and even a couple who said "I've never seen this before" when looking at the code!!)