In our experience, the best way to learn how to interview is to talk with hiring managers. The 2nd best way is to pretend you are one.

We SWEAR by this book: Who (http://www.amazon.com/Who-The-A-Method-Hiring/dp/1400158389)

Skip to chapter 4.

It's structured our interviews as we grow our team at http://thinkful.com/ as well as work with students to improve their resumes as junior engineers.