EPAM Systems Software Developer Sr interview questions

Applied to the company via an agency. I was told that online test invitation would be sent shortly however I had to wait for 3-4 weeks for this . When I received it, it was scheduled by EPAM resource team on public holiday! Anyway after few hurdles, my online one to one interview was conducted by some engineer from Ukraine. I was told that I got through that round however it ended up in black hole. I didn't hear anything from them. Annoying thing was it was very painful experience as a whole, took lots of effort from my end to prepare and attend interview. Even after clearing the round I ended with empty handed. Being a contractor, I hate to loose my time/money!