First stage was a home c++ programming assignment to complete in 9 hours. The assignment was to implement an efficient operation on some unique data structure based on an internal std::map. Not very hard if you are familiar with std::map, but there are some corner cases, so you probably would need a randomized test to get them all. Second stage was a Skype interview (with screen sharing). I was given an assignment to implement a template function of a binary search with minimal number of comparisons (optimal solution does exactly one comparison per iteration, so it's not the textbook implementation). They don't allow using a compiler or debugger - only a text editor. Also, doing a web search is not allowed. I followed the rules but this is pretty silly since one can cheat quite easily (with another PC). The interviewer put me on hold several times, leaving me in an awkward situation - waiting for him to return. At some point I was put on hold and he never returned. After quite some time (hours..) an HR woman contacted me and told me that he went to some meetings. I beleive this is very rude and disrespectful, wasting pepole's time like that. Didn't even apologize, just disappeared. So, be warned.

After spending hours to do a test - they reject the application without even bothering providing feedback (and that despite the fact the test was well done and passing all the tests) - that is not a professional behavior and lacks respect for the time people invest in the process.