I applied through college or university. The process took 4 weeks. I interviewed at Dow in Nov 2012
Interview
First interview at University campus, then on site. Everything was smooth and fast. I was given only two weeks to decide accept an offer or not. Multiple 30 min one on one interviews followed by going to lunch / dinner with 3-5 folks.
Interview questions [1]
Question 1
I was asked many times about my hobbies and how do I find local climate.
Interview was ok. Gave 45 min presentation with approx 10 attendees and had personal interviews with approx 5 people. Don't remember much else unfortunately as this was a while ago.
I applied online. The process took 5 weeks. I interviewed at Dow
Interview
Long but very useful. Met several stakeholders who gave a good overview of the process. At PhD level, you will have to present your work. Got a tour of the facility
Interview questions [1]
Question 1
What the greatest technical challenge and how did you go about solving it
On-site interview with multiple interviewers asking specific questions based on my resume and work related experience. Some behavioral type interview questions related to how I work with others and how I handle certain difficult situations