Originally Posted by jwenting

First you'd best gain experience using Java in a production environment. While it's possible to sit the exam with academic knowledge only it's not recommended.

Then study, study a lot. For the 1.4 SCJP and SCJD exams (exams 310-035 and 310-027) get Kathie Sierra and Bert Bates' certification book (ISBN 0072226846).
Work through the relevant part for your exam (for SCJP that's the first half roughly) several times until you can almost dream the smallest detail.
Do mock exams, lots of mock exams. The exam questions aren't hard if you know your stuff well and are meticulous but they're worded in tricky ways and there are many pitfalls like minute errors in the question code so that it does something totally unrelated to what it seems to be doing. Practice to prepare to see such things.

When you feel ready and get 80+% on mock exams consistently contact Sun Educational services to get an exam voucher.
Then contact an exam center near you (Sun should have a list) to schedule the session.

I'm currently working on the exam myself, hopelessly delayed because I can't find the time to really sit down and study.

A good source for information is also http://www.javaranch.com

Originally Posted by George87

Do you have any idea from where I can get some mock exams?