Yeah this is such a dilemma... New code is adopted this year yet the exam is still using prior code.
If NCEES is anything like the building officials, my guess is that answering using the new codes won't get you full credit
.
As I recall, each question actually calls out the specific reference including its year (i.e., ASCE 7-05). So answering a question that has specified ASCE 7-05 using ASCE 7-10 wouldn't make sense.
One thing I would really watch out for is the wind provision in ASCE since it's significantly different between 05 and 10. Kind of sucks that you'll have to learn 10 for work but 05 for the exam. They are somewhat similar but things got moved around a bit (they also changed the load from ASD level to strength level).
On the bright side though, even though there are some changes to seismic but in general they are pretty similar in terms of formulas and such (I think).
My advice would be to keep studying what you are studying (SEAOC 2012 IBC). Once you are done with those, make sure you ignore all the new code references and just use the prior code references when you do the practice exams.
Is that helpful...?
I'll have to do a little more digging to identify all of the important differences between prior code and new code. SK Ghosh usually has a few good ones (
like this) but I would love to try to condense. Maybe that could be one of my projects if people think it would be useful.