Apple Software Engineer interview questions

Recruiter reached out to me, Recruiter screening were basic behavioural questions like what are you studying ,tell me one project etc.The technical round just had tell me yourself and jumped right into the code. It wasnt a leetcode code but rather a media streaming code(the team that was interviewing was AMT) They asked me to give them mathematical formulas, then told me how do you think we can optimize it,I was confused but tried my best.Interview told me he will get back to me in email and then ended the interview