<human>: Can you succinctly summarize the text in 1-3 sentences?

Hey /r/jobs,

Long time lurker, first time poster here. Quick background: I'm an American living in France (got my b-school degree here) and did some work for a bootstrapped start-up that is going under. I've been looking for employment for some time and had a great interview for an entry level biz dev job here. After the interview, which mostly consisted of pleasant conversation and softball questions about my experience, the company itself, etc., they invited me back for a second round interview with the founder. I don't want to screw it up, thus, I am here: 

I'd like to know if you have any thoughts about:

1. how poignant should my questions to the founder be? ex: I have some concerns about the business' long term model. Will this make me sound knowledgeable or too full of myself or ____? I assume asking him something like what his favorite color is will result in a short interview.
2. how the environment of the interview will change from the first go-around;
3. whether or not the degree of question difficulty will escalate (and, more specifically, what are the kinds of second-interview questions a biz dev guy can expect?)

That last one is the biggest for me. Any thoughts/input would be **greatly** appreciated, /r/jobs! (wait, am I in the right sub?! Apologies if not)
<bot>: Second round biz dev interview in foreign city. What types of questions can I expect from the start-up's founder? Cheers!