Experienced devs, how well do you remember the computer science fundamentals?

Suppose you were to be interviewed right now without any preparation and asked questions about computer architecture (virtual memory, memory hierarchy, all that jazz), operating systems, database internals. How do you think you would pass?

Asking because I tend to forget all that very quickly due to not dealing with low-level stuff at work, and that makes me sometimes a bit ashamed of myself when I read articles about experienced developers who patch databases, tweak garbage collectors, and fight for milliseconds of performance.

This is not even the imposter's syndrome, it's a realistic realization of the fundamental skill gap. As I said, however, I tend to be prone to the "use it or lose it" effect.