I applied online and a month or two later I received a message from a recruiter asking me to solve two problems (int to long and trinary tree the same problems everyone else got). The problems weren't very difficult but I must have missed a corner case or maybe they docked me for not including unit tests since they sent a rejection shortly after. Since it seems like they reuse the same coding problems every year, I presume that's why they give no feedback about your coding problem.