yes, if you pass at the test center, send an email to certification@cloudera.com if you want us to validate it. We can do that and then you can buy in to the challenge "legally." And yes, scaleability is a condition, though it's somewhat built-in by the problem in that your solution necessarily must be scaleable to get close to accurate. I would need to ask the guys building the grading harness for more specifics. ... View more