[D] Diffusion research interview experience?

Sorry in advance, these might be bad questions, as I don't have any interviews right now and thus no specific questions, but I'm trying to get a realistic picture of what technical questions come up when interviewing for Research Scientist or Research Engineer roles focused on diffusion, so I can prepare better in the future. Here are some things I'm wondering about, but feel free to include other stuff not listed here, also don't have to answer all questions: How did you prepare? Any specific papers, books.