Larson Davis interview questions

One in person interview. The interviewer was thirty minutes late. The majority of the interview was the interviewer showing me what the company does and what I would be doing in my role. There were a few technical questions towards the end. They also had me take some tests online (I can't remember if it was C# or Java) and I did well. When I reached out to the interviewer for follow-up information and feedback (several times), he just ignored me - very unprofessional. I was bummed out they didn't extend an offer or even let me know they weren't interested. I received several other offers elsewhere and accepted one.