There are some JSTL questions on the real exam; all questions are from the *core* library only (things prefixed with "c").
The official objective related to this is:
"Identify the tag syntax and describe the action semantics of the following
JSP Standard Tag Library (JSTL v 1.1) tags: (a) core tags: out, set, remove, and catch, (b) conditional tags: if, choose, when, and otherwise, (c) iteration tags: forEach, and (d) URL-related: url"
You won't have questions on *all* of these, but you *could* have questions on any of them
cheers,
Kathy