Apple Data Engineer interview questions

First round technical interview - implement Map Reduce using Python (or other language of choice) in Hackerrank. Online via zoom, with a member of the team one would be joining.

Recruiter reached out to me to set up a time for HM call, no recruiter call beforehead, we communicate online and the first round is with Hiring Manager. Recruiter attached the JD in the email but the job point already removed from the website so I have no clue what the interview is about, and recruiter are not responding to any follow up question I have with the interview.