Roblox Software Engineer internship interview questions

I got a mail stating that the interview will be held at a particular time (morning) on a particular day. I got the call and then I was told by the interviewer that he will call me in the afternoon. I kept waiting till the evening and I didn't get the call. I emailed in the evening asking if the interview will be held. I got the email stating that the interview will be held next day in the afternoon. I got the call in the afternoon. I don't know if the interviewer had my resume. He asked what I was currently pursuing. He asked me what courses I took till now. He asked me questions based on my courses and none from the resume or projects. I didn't remember the topics which I had studied in the course work. I told him the same. He asked me few more questions related to the hash table, how once can remove collisions in the hash table, complexity for removing the value from the hash table and polymorphism which I feel I answered correctly. At the end, he told "Don't think you are a fit for this role. You can't forget what you study in the courses." I need to strengthen my basics. That's what I fell. Hope it helps you...!!!