Fortran Traffic Systems interview questions

Initial phone screening asking you about your familiarity with different languages and technologies. Afterwards you are invited to a follow up video call interview. The follow up had 2 programming problems and 2 brain teasers. The difficulty of the problems were Leetcode easy.

Got an email saying that they will be phone screening and asked for time confirmation. Received a phone call a few days later and was bombarded with several questions. When the interview was done, there were a few questions that I wanted to ask, but the interviewer said that he doesn't answer questions in phone screening.