Hi,
Fowler's book is not sufficient. You will
need to read Larman's book as well.
Additionally make sure you do some mock
exams as well. I used Whizlabs, and some
other exams found on a Yahoo forum, I
can't recal the exact name (something like
OOAD MEDA).
In any case a fellow JavaRancher M.Zaikin
has posted some links to his free magnet
mocker with, what a coincidence

, UML
tests. I think it's worth a try.
Good luck,
Gian