MathWorks EDG Engineer interview questions

I had one day on-site interview in Mathworks company and it was a great beginning for interviewer to know the company and then there will be three rounds interview and each will take 1 hours. But I think I did a good job but I did not get the offer

Talked to the company representatives at an on-campus career fair and left both a resume and my information on their laptop. Was contacted a week or two later about participating in one of their "College Days" where they fly you out to their location in Natick, PA. The interview process consists of a technical interview (1.5-2 hours), a manager interview (1 hour) and an HR interview (1 hour). The technical interview can be a bit rough. Some of the things they ask are so basic that you might not have done them for a while. Makes you feel a bit silly that you would struggle with such a simple problem, but just try to relax and work through it. Unfortunately, the lady that was interviewing me didn't give me any sort of feedback into any of my answers (right or wrong). There was just a pause at the end of my explanations, blank look, and then we moved on. The manager interview is basically them trying to find out what kind of person you are. The manager I interviewed with was awesome and overall the conversation was very interesting painless. The HR interview is a bit like the manager interview, but they spend about half of that time telling you about MathWorks (company policies, medical coverage, etc.). Overall, they seem like a very interesting company to work with, the employees I spoke with seemed happy there, and things didn't look or feel scripted. You will know within a week if they are interested in you. At that point, they will contact your references and conduct a background check on you. This is where I'm at right now.