Hi Mark,
I went through the exam objectives and did find just these two issues relating to your question:
"Identify the APIs that all
EJB 3.0 containers must make available to developers"
"Identify correct and incorrect statements or examples about how enterprise beans declare dependencies on external resources using JNDI or dependency injection, including the general rules for using JNDI, annotations and/or deployment descriptors, EJB references, connection factories, resource environment entries, and persistence context and persistence
unit references."
Seems they do not expect deeper knowledge about the
Java Connector Architecture internals.