Epic Software Developer interview questions

I received a call from Epic after applying on their website, I applied a couple of months ago. I received an email from the HR saying they were interested. I replied to them and in about 4 days after my response we started with the entire process. The first part is a personality test (third party portal: Rembrandt). The personality test consists of some [very] simple mathematical questions along with some situational\personality questions like "Do you like to work in a team?" etc. There are no right or wrong answers After two days, I received an email from the HR saying they would like to set-up a phone interview and gave me a preference of dates. I immediately confirmed a date (which was 4 later). The phone interview lasted for about 20 minutes. The person on the other end was a software developer. The interview's purpose was to know me better and get more details out from my resume. We discussed about my prior experiences and he asked other standard questions that everyone else has mentioned (Five years from now?). Overall things have been pretty smooth so far, two days after the phone interview the HR contacted me and invited me to Madison. I am scheduled for an on-site interview next week. Will post more about it after I am done.