I applied online. The process took 2 days. I interviewed at Merck (Lansdale, PA) in Nov 2014
Interview
Phone Interview. HR and hiring manager interviews. Standard interview questions mainly to understand the type of person and how well you can work with the team. Each interviewer took about 30 mins. I heard back them after 3 days with the offer.
I applied through other source. The process took 3 months. I interviewed at Merck (West Point, PA) in Aug 2013
Interview
Three 20 minute interviews during super day (interview day for interns). One HR focused, and two technical focused. Technical case study dealt mainly with a reactor and heat transfer scenarios.
Interview questions [1]
Question 1
No questions were really unexpected, fairly generic interview experience