I'm still confuse about how many vouchers I need to buy for the Developer exam. I think I need to buy 2, right? Actually I've already bought 1 but I don't remember if I used it to download my assignment. Well, the first voucher is used to download the assignement or to submit it? And what about the second? Is it for the exam essay?
Should I purchase both parts (the exams and assignment) at the same time?
You should be aware that there is no time limit on completing the assignment, however vouchers have a time limit.
Vouchers are valid for different lengths of time from country to country. To the author's knowledge, this can vary from 3 months to 1 year (other periods may be possible).
There have been reports of some Sun offices telling candidates that they must purchase the exam voucher at the same time as they purchase the assignment. This is not the case in all Sun offices though.
My recommendation would be to only purchase each section when you are ready to use it. That way you do not have to worry about any time limits on each section.
See also the next question: "My voucher for the exam is about to expire, what can I do?"
My voucher for the exam is about to expire, what can I do?
Check the wording on the back of the voucher. It typically has words to the effect of:
"You must register for an exam prior to the expiration date printed on this voucher. Voucher expiration dates cannot be extended. Your actual testing appointment may be deferred for up to one year after registration."
So register for the exam before the voucher expires, then contact prometric and defer the exam. You may defer multiple times.
Be aware that Prometric and the test centers themselves have requirements as to how much notification must be given before defering an exam. So dont leave it to the last minute.