Hi Mat,
the term
<!ELEMENT...> disturbs me. When I look at the Deshmukh book (SCWCD Exam Study Kit 1st edition 310-080) I can find lots of this term therein.
On the other hand I can not find one single hit of this term in the HFSJ book. Hence I guess that JavaRanch's mock exam is
not compliant with 310-081 or better the current exam.
That's not saying that one shouldn't do the exam, however she/he should not rely on it and take care to do some 310-081 exams.
HFSJ says on its back cover:
This new exam is tough. Much tougher than the previous version of the SCWCD.
Regards,
Darya