National Instruments Sales Operations Support Specialist interview questions

I applied online and was called by the hiring supervisor within a few days. He conducted a phone screen and requested that I come to the office for an on-site interview with him and 2 of his team members. Within a day or two I got another call from the hiring supervisor, asking me to come back for another on-site interview with his manager. A little more than 2 months went by before I heard anything from them. They did not respond to any follow-up emails or phone calls that I made. I was sent a denial email just after the first of the new year.