Interview Advice / Avoiding Competitive Intelligence Gathering

Hey Hackernews, I am an early/mid-career engineer who is interviewing for new positions in FPGA development. In the last month I have had a series of interviews that seem to be mining more for information than looking to hire for a specific role. I am curious if there are resources or advice that one can follow to demonstrate knowledge and balance the interview process without seeming entitled or rude.I started my career in academia so some of the business conventions are taking some getting use to.

Thanks for your help!