it was straightforward and it flows like a casual conversation rather than analytical interview so it helps not to make me so nervous and ace the iv pretty well i guess

You will go through rounds of interviews, but they will never let you know who you will be working for. Even after you aced the interview, the recruiter still keeps it a secret. Until the day you arrive at the office, only then will you know the client is one of the biggest companies in the world. The company also conducted extensive background checks, too much, I would say.