Merck Intern interview questions

I applied for the Vaccine Manufacturing and Technical Operations Intern position. The interview was very straightforward: why do you want to work for Merck, previous job experience, etc. There was a case-study type question, as well as a question to throw you off at the end (really to gauge your personality). I applied online but the interview was on my college campus (as we have a campus recruiter). Hearing back from my interviewer took many months, however, as well as lots of email correspondence and delays on their part. Had an interview in October and didn't get an offer until December. Rejected the offer because the job didn't interest me as much as another one, but the pay was very nice.

Three peoples gave a phone interview in the same time, took turns to ask about some behavior and technique questions based on my resume, at the end of interview, they let me asked some questions about them.