I applied online. I interviewed at Cengage (Boston, MA) in Mar 2014
Interview
It was a multiphase half day interview with about 6 people.
It was scheduled for 4 hours and ended up take over 5.
There was a second interview a couple weeks later with the VP of MIS. That was scheduled for 2 hours and took less that that.
Interview questions [1]
Question 1
I don't remember one specially but the VP of MIS did ask some formulaic questions.