MediaMarkt Experienced Software Engineer interview questions

The process started directly with the tech interview. Although I expected an initial HR briefing/introduction before going to the tech part. Anyway, as soon as the call started, the interviewers(2 people) jumped on frying with questions without wasting a minute. The second step was to do a take-home coding challenge. The third step was then a discussion based on the coding challenge and further questions on why I did what I did. This third step also involved an HR who joined later and that's when the most unprofessional thing happened. Amongst 3 other people in the same call, HR asked for my salary expectations (Talk about confidentiality).