it was confusing. on call with HR, i was conveyed a different structure of the interview, the one mentioned in the email was different and then the actual interview was different than both. it caused a lot of preparation issues since i hadn't refreshed the knowledge that they were asking about. they questions for a fresh grad interview were very straight forward and conceptual from OOP, DSA, DB, OS and CNET. i should have cleared out this confusion with them.