If i were you i would study HFJS 3,4 times thouroughly. this is from the experience of taking the exam.
Try to pass the mock exam at the end of the book and consider it as semi-final
.
coming to other resources i didn't refer to any other specs or anything. so bottom line is thourough reading and understanding of HFJS is the key.
by the way don't forget to memorize the API and its 4 packages.
that's it
you should be good.
