Ask HN: How to network with executives as an MBA student?

I'll soon be attending events with higher-ups of companies I'm interested in working for. While I certainly don't place people on pedestals, I don't want to make a fool of myself either.

How should an MBA student go about conversing with executive of major companies? What are the non-obvious questions and etiquette I should keep in mind?

My professors have given us preparation and tips, but I'm also curious what some of the HN folks have to say.