This is a sign that the interview questions aren't there to actually assess technical ability, but are geared towards excluding anyone who hasn't travelled in the right circles. The employer isn't looking for someone skilled, they are looking for someone who is pre-filtered to think a certain way and know certain things.
Maybe. I tend to think that's a cynical take. Never assume malice when incompetence will suffice.
This is a...youthful...industry, and a lot of junior people (with "senior" titles!) are out there doing interviews. It takes experience to become a good interviewer, and if you've never had that experience, you don't know what you don't know.
