Apple Software Engineer interview questions

Can you describe your experience with data analysis and statistical methods? How do you ensure data accuracy and quality control in your work? Can you provide an example of a complex project you managed that involved large datasets? How do you communicate statistical findings to non-technical stakeholders?

Initial recruiter call, then 1 hour technical screen(this went well), so got virtual onsite of 4 rounds. Out of 4 rounds, first one is coding+technical questions(around java/spring boot), second one(LLD), third one(HLD), fourth one(Product thinking round). All interviewers were good, except for the one in the second virtual round who asked LLD, he was unsatisfied with my LLD, which is totally fine, he could have just sent a feedback but instead yelled and made a comment that my design was brutal, never heard these kind of words during interview. The recruiter was super interactive up until virtual onsite interview but din't even turn into giving atleast a rejection mail even after a followup.