[Hermitian909]

> In the last month over ~15 interviews the questions have been all over the map.

While I wasn't in your interviews, my experience is that this feeling disappears as you get better at these skills. I know that's also been the feeling over dozens of other engineers I've helped practice for these interviews.

My experience from the interviewer side of things is that candidates often aren't strong enough to see the small number of core concepts backing these questions whether it be certain data structures and algorithms or more general architectural know-how. This occurs because their knowledge of those concepts is usually very surface level.