Tripadvisor Software Engineer interview questions

After applying for job, I was contacted by HR to arrange a time for interview. They were pretty flexible with that. On the interview day, as soon as interview start, they started asking questions. The questions were too academic for a person with 4 years experience. The role was supposed to be for a person who has got good experience. Instead of asking technical questions or questions about my experience/expertise, they started asking me academic questions of semester 1. Like "What is size of Integer?" All other questions were also academic and theoretical. Very immature.