Howdy !
The best choice for SCBCD probably will be a Reference Implementation server which comes with
J2EE 1.3 SDK.
"Head First EJB" by Kathy and Bert has some section which covers deployment on RI server.
If you have "Enterprise JavaBeans" by Richard Monson-Haefel (3-rd edition), then you can try samples using JBoss 3.2. This book has free companion Workbooks in PDF which are available
here.
Keep in mind that this exam is about vendor-neutral technology, so try to avoid digging into WebSphere-, or Weblogic-specific details.
regards,
MZ