Deloitte Business Technology Analyst interview questions

I was invited to go to the Deloitte technology day in Zaventem (Introduction, Lunch, Business Case, HR Interview, 3 Booth Sessions, networking dinner all in 1 day). Overall a good day with lots of learning about Deloitte. Business case was in group with presentations in front of HR Manager and Partner. However, when I went to the toilet during the networking dinner, the door of the office of HR was wide open and they were going through all the names giving negative feedback about certain people and joking around. If you want to position yourself as a professional firm, at least close the door if you're talking about people in a negative way. Very unprofessional. 2 weeks after I got invited for a final round of interviews with a manager and partner from Deloitte Digital. The interview with the manager was ok, the one with the partner not so much as he was not at all interested, started calling 3x in the middle of my interviews and had the most random questions that (he asked in 3 different languages at the same time) were not at all related to the interview and he didn't seem to be able to keep his focus during the conversation so that was a very negative experience for me. Deloitte should train their partners better at HR interviews.

There was one guy interviewing my who didn't seem to know the subject of my project for good reason as my branch was unrelated to his domain of work.