I love them, fun challenge, get to experiment with something new. (either by my choice or by requirements) You also get an idea of what company cares about and

I love them, fun challenge, get to experiment with something new. (either by my choice or by requirements) You also get an idea of what company cares about and if its a good match for you. If you move to next step you did something right, if not then there are others that have done better. Ghosting might be a problem like someone forgetting to process stuff, vacations, etc, just check with recruiter whats the status, dont be antisocial. And if it took you 6 hours to do, you chose to do it, and hopefully you learned something. There is no implied obligation on other side to pursue you just because you took on challenge.