Salesforce Performance Engineer interview questions

YOE: 2.5yrs I had applied through salesforce career portal. After two weeks Recruiter called me and scheduled for virtual onsite Interview process. PS: The days mentioned below are not consecutive. The schedule lasted for a week. Day 1: Two 1 hour F2F interview. Discussions about work experience and its related technical questions. I was given with a whiteboard programming question. After these two rounds I received hackerrank challenge for 90mins. It consists of one medium and one hard problems. I was able to solve only one problem at that time. Day 2: At morning, a one hour F2F with two panelists and it basically had DSA questions and work experience related questions. I was also given 2 programming questions (needs to be executed). By afternoon, a one hour F2F with hiring manager. Discussions about work experience and behavioral questions. And I was also given a puzzle question. Day 3: One hour F2F interview, which had mainly system design and performance engineering related questions and also with work experience questions. Day 4: A 30mins F2F call with Director of the team. We were discussing about few basic work experiences and some general talks about the role and culture. (Basically it seems like they are checking if you're fit for their culture) After a week I have received the offer proposal and I accepted it happily. Totally it took a month from the day I applied to offer letter and I feel that's really fast and easy process.