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this might be a unusual request, but i'm not interested in Certification itself (i use and love Vaadin, but i'm not yet certified, sooner or later...) but rather the software you use itself. Is it a vaadin app? Or an external service?
I need a web based software to create and give an exam to some users. I've searched for one online but neither of the one i've tried fulfill my requirements:
Secure: users identified by username/password
Questions taken randomly from multiple pools
Allow to resume if a broswser crash/power outage occur (within the defined time limit)