It was a generic interview that took less than one hour.

It started off with some "get to know you" questions and sharing experiences and projects, while the interviewer explains what the program is about and the possible things you'll be working on.

Then, it moved on to more technical questions, which were mainly about your knowledge on feature X/Y/Z on a microprocessor and some trivial questions that you'll know if you have studied them. If not, then it's not entirely your fault, since universities cannot teach everything.

So, just try your best. If you don't know, just say you don't know.

It was around a 30-40 minute interview.

Do you have experience in using feature X in a microcontroller?