AT&T Data Scientist interview questions

It was a very good process. Received an email from recruiter for a telephonic conversation. After the conversation , technical round on phone in next 3 days and the final call from HR

First stage was a discussion around my background and the role with some technical data science questions, second stage was possibly the most pointless and total waste of time it was as if the interviewers were not interested in anything I had to say apart from asking me development questions rather than data science questions like a quick fire question match. The interviewer also had no clue how to ask questions properly as if they totally lacked experience or knowledge of the subject matter. Possibly, the worst phone interview I have had where I felt the interviewer had no clue about the data science process. Also, majority of their questions were unrelated to the role.