Capital One Software Engineer interview questions

I submitted my application online and they got back to me via email within a month. They set up an in-person interview a week from sending me the email. The in-person interview includes 3 Interviews in one sitting, including a behavioral interview, a case interview, and a technical interview. The case interview was challenging but Capital One did offer all interviewees workshop and demo videos to help us study. Coding questions are fair. Need to know basic data structures.

Applied online then contacted by a recruiter after a week, set up a phone interview with a Sr. manager, Software engineer ? I feel like they are just doing the interview for the sake of saying we tried to fill this position with other candidates but probably have someone in the interviewers mind!