I've seen that XML W3C certification cover almost everthing that SCDJWS !!!
So..that's my tip....when you are already to take SCDJWS...take XML W3C certification too !!! Cause it's easy, cheap $75 (U.S.) accessible ... you can do in your own home !!
For full informations see http://www.w3schools.com/cert/cert_xml.asp page.
Enhance your curriculum with another important credential!