Hi Susie,
If you want to know which mocks have questions which approximate the level of difficulty you'll find on the real exam, then, by all reports Marcus Green's Exam 2 and 3 come close. Bill Brogden's mock has good questions relating to overriding, overloading, class initialization, etc. Jamie Jaworski words his questions to similar to what you see on the exam but the mock is not as difficult as the real exam. I never used the RHE so I can't give you a comparison.
Also, don't forget to try
Sun's example exam Good luck on Wednesday
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Jane Griscti
Sun Certified Programmer for the Java� 2 Platform
[This message has been edited by Jane Griscti (edited July 15, 2001).]