ByteDance Data Scientist interview questions

HR POC often gives no response to my questions. The interviewer appears to be much junior than me and very unprofessional. The interviewer who interviewed me knows little about the subject. In the end, you do not even know who is HM and what he/she exactly wants.

ask about internship and project experiences, followed by machine learning questions. then, they ask me about algorithms questions and ask me to solve and optimize. at last, they got back to me one week later and i was rejected.