On Cade and Sheil book, Figure 9-6 contains a sequence diagram with solid line arrow from NoticeManager to NoticeController. The return arrow is labeled as 'return result'. Shouldn't the arrow be an arrow with dash line?
Also, there is a solid line arrow called 'render result' from NoticeController to Result.jsp, shouldn't this also be in an arrow with dash line, since the NoticeController is just returning the result to result.jsp (and not invoking a method on the jsp page).
What i noticed from those diagrams is they just present an outline and you have to look for more details to complete the diagram from elsewhere. If it is very complete in all nature what are the exam takers supposed to do. Just follow and re-draw the diagram for their assignment? Exam takers have to do the homework to make the assignment complete.
SCJP1.4, SCBCD 1.3, SCWCD 1.4, SCEA 5, JLPT-N3