Frankly speaking this is a Excellent service. You will get mails with multiple jobs on daily basis .
I am taken exams on 5 skills . those are Java, HTML, J2EE, Springs and C+ .
I got good scores on those skills . Really its a very good feel to check my self and to publish my scores to recruiters . This kind of feature on Wisdom is very helpfull to jobseekers like me to improve ourself .
My advice, better to write exams along with uploading profiles in Wisdomjobs.