When you don't have *NEGATIVE* marks for the WRONG ANSWERS, it's obviously becomes a fluke mostly to clear the test. To me it's not a matured interview/hiring process by trusting the tools too much rather assessing the candidates on the relevant skills/experience/performance/track record. Even I hired the resources in my career in a very big/reputed companies without depending on these so called "Cognitive tests" and those turned out to be champs in their respective fields and contributing greatly till date. And I definitely don't prefer to join these kind of companies as the same mindset reflects mostly in the working environment also.