OK, I'll bite as a former CTO and hiring manager. A lot of the advice is bad because many companies have terrible hiring processes and candidates have to work

OK, I'll bite as a former CTO and hiring manager. A lot of the advice is bad because many companies have terrible hiring processes and candidates have to work around that. Questions irrelevant to the actual job are a bad sign, unless they are asked early as part of the screening process or to assess the level of seniority and experience of the developer. Ultimately you should treat the interviewer as you would a customer, try to understand quickly what they are looking for without asking too many questions, and demonstrate those qualities, assuming you are interested in doing so, of course.