I applied online. The process took 5 days. I interviewed at MathWorks (Natick, MA) in May 2013
Interview
The interview largely consisted of triaging a (strategically) broken computer and its operating system. I can't really disclose any specific questions ethically, but for the most part the examination is hands-on and graded using a scoring sheet. There are interviews with the hiring managers after the fact, but those tend to be short. The exam score is the primary hiring criteria.
Interview questions [1]
Question 1
Oddly, the toughest part of the interview for me was interacting with the managers. Many of them can be difficult to get a "read" on, and sometimes they're looking for contradictory things.