I applied online. The process took 4 weeks. I interviewed at Mathematica
Interview
Initially contacted for a phone interview two weeks after applying. Heard back for a follow-up interview after the phone call less than a week later. Very quick turn around in that process. However I waited more than a week for the follow-up after the in office interview.
Interview questions [1]
Question 1
I definitely got the "Where do you see yourself in five years?" question most frequently, personally I'm not fond of that question because you can never really know, and it's silly not to say working for the company you're interviewing with.
I applied online. The process took 2 months. I interviewed at Mathematica (Chicago, IL) in Apr 2015
Interview
I applied online and was emailed within two weeks to set up a phone interview. The call was more of a conversation about the reasons why I wanted the job and what the job would entail. In a week I was emailed to set up an in-person interview. This was scheduled for a few weeks later. I met with 7 or 8 different people either over Skype or in person, and each interview lasted a half hour. They took some time to get back to me (over two weeks when they said 1-2 weeks) and I was informed I didn't get the job.
I applied online. The process took 4 weeks. I interviewed at Mathematica (Princeton, NJ) in Mar 2015
Interview
I had an initial telephone interview that was followed by a full-day interview about a month later (this was due to a combination of full schedule on my part and somewhat limited availability of HR on theirs; I got the feeling they'd have preferred to have it sooner). The full-day interview consisted of interviews (some group, some 1:1) with people at various positions (same position, slightly senior, supervisors, etc.). They all asked pretty much the same questions as each other.