AT&T TDP Intern interview questions

Got invitation to OA about a week after applying. 4 very easy questions, 2 math 1 programming 1 SQL. Received an invitation to schedule interview right after. Interview is with two current TDP members, and is technical, 1 coding question which was very easy, then they moved onto system design which I was not prepared for. Interviewers were nice and explained the process easily

Passed first round interview that was in Hackerrank, about 10 questions coding in your choice of Python or R. mostly simple filters, working with a data frame, and extracting some insights. Second round was a behavioral interview, I answered all the questions using STAR format without any hesitation. Did not pass behavorial.