I was referred to an Uber HR manager through a current employee after submitting a CV and cover letter. An initial informal phone conversation was scheduled very quickly. I had expected the call to be purely informational, but I ended up getting asked quite a few interview-type questions. Next came completing a a timed exam that required me to analyse some data and write up my conclusions. Although I passed the test, my conversations with HR stalled, and they were not proactive about advancing me any further through the recruitment process. Not sure if I simply did not fit what they were looking for, but if this was the case, it would have been more professional of them to have simply rejected me outright rather than leaving me hanging.