I got a call from one recruiting firm and scheduled the phone interview with the hiring manager and got an email for an onsite interview within a couple of hours. The onsite interview was at Connecticut and they flew me to JFK and then rental car drive around an hour. The interview was with 6 people and they all are friendly and niece except one who has Ph.D. and working there for 10 years and starts asking about some random dynamics questions and then when I asked him the solution, he told me to do it as a take-home exam. Then when I was with my last interviewer, one previous guy gave one cheat to him and they asked me to interview with one more person. And I refused because I have to catch the flight back. The company is pretty old fashion and everyone over there working in the same company for around 5 years. I got a call from recruiter after a couple of days letting me know that because I refused for the additional interview they don't want to go ahead with me. It was a whopping 4.5-hour interview.

Applied normally and received a screening call from a recruiter. General questions about relocation etc. and scheduled a call with the Hiring manager later on for say about 30 mins. Everything was very chill, its just my interview got scheduled very late in the week (Friday afternoon) and they had shortlisted the candidates before. Also I messed up the interview by getting a lot friendly (Not my natural element in interviews) than one is supposed to be. My advice is be straightforward and in your natural element.