I think a big part of the discussion that's being missed here is that a lot of senior-level engineering jobs aren't about coding. They work at higher levels, an

I think a big part of the discussion that's being missed here is that a lot of senior-level engineering jobs aren't about coding. They work at higher levels, and are often communication-intensive. I work in DevOps. If I'm interviewing someone, I'm going to ask "Explain the difference between continuous integration, continuous delivery, and continuous deployment". A junior person who can answer that well gets a big thumbs-up from me. A senior who can't answer it will probably be rejected out of hand. In neither case is implementing Towers of Hanoi on a whiteboard useful for the job.