It is probably different where you are but what would actually happen is that it would take you at least 3 months to work out they can't do the job (they are pr

It is probably different where you are but what would actually happen is that it would take you at least 3 months to work out they can't do the job (they are probably not terrible just not good enough) by which time you have lost 3 months and perhaps $20K recruiters fee and now have to start the search again. Of the people I have interviewed in the UK for "Senior .Net Developer", I would say that 75% did not meet the grade and that was with face-to-face interviews that took a lot of my time. An exam isn't perfect but if someone can't answer a reasonable spread of questions to a half-decent degree, then I don't want to hire them and it saves me hours of my time. Sorry.