T-Mobile Software Engineer interview questions

Got in touch and introduced to the position by a recruiter. I was asked to finish the coding assessment online which are 2 coding questions. Then I was invited to the 3 hours long interview: the first hour is behavioral interview with 2 interviewers, the next 2 hours is technical interview. The recruiter will send a list of 6 topic you may choose for your technical interview. I was asked to choose the programming language I would like to code and prepare the IDE. The interview process took 2 weeks long.