I applied online through Merck's website after multiple tries (it kept freezing) and received an e-mail about a month later saying I had been approved for a phone interview at a certain time on a certain date. I replied accepting the time slot. I had a 45 minute behavioral interview asking how I had handled critical situations in the past and the results I saw. I wasn't asked any technical questions. My interviewer was friendly but professional and to-the-point.