Merck Manager, Operations interview questions

The overall process in one word would be described as - cumbersome. First step was the online application(~15m), about 1.5 month turnaround to find out I progressed to the face to face round robin (5 person) interview. I was told someone would reach out to me to inform me of details, this never occurred. Interview team started late, when one person would exit the room, 10-15m later another would enter. Each person held a 30-60m interview (individually, each interviewer was well prepared and very easy to talk to). Interview lasted ~4-5hrs. I heard nothing for nearly 6 months, then while on vacation got a random call from HR. HR personnel followed up (2-3 days) with an email, this turnaround was consistent with every email I sent for negotiations. After I received an offer, negotiations took ~3-4 weeks, with what could have taken 1-1.5 weeks with appropriate response time (the dates written on each offer showed the document had been revised and made into a PDF the same days I replied to emails). All-in-all, the entire interview to job offer took nearly 6 months. During this time I went through several other phone screening and face to face interviews to offers, which had taken 1-3 weeks in comparison; from equally large global companies.