Arniie had an interesting experience with taking the Zend Certified Engineer test recently - especially once he found an unfair advantage.

So we embarked on a voyage of PHP/Zend (re-)discovery, we booked iBuildings to do a re-examination of our PHP knowledge - a refresher course if you will. [...] In exam euphoria (and depression) [after coworkers had taken the exam] a few questions were discussed to demonstrate the intensity of the exam. I promptly 'googled': "PHP extensions using the dl() function" and low and behold: http://www.exam4test.com/200-500.htm

His google result turned up a page with 20 example questions from the test and the possibility of more just $49 USD more. The site was providing a direct means to pass the test without knowing much PHP at all. He notes that this one thing is enough to disillusion his about the quality and merit of the exam.