Yes, I remember one guy asking what I would when a page was going slow. I explained how I would work backwards checking the network tab in the browser, make sure it was the endpoint that was the bottleneck, blah blah blah to the database. He just wanted me to say "use explain" - which i would have got to if he had bothered listening a couple more minutes. Then he wanted me to do a "challenge" that was expected to take around 10 hours. No thanks, you didn't convince me I want to work for you.