VCS-276 is for Administration of NetBackup v8.0
VCS-277 is for Administration of NetBackup v8.0 and Appliance v3.0
I don't know if the training materials alone should be enough to pass. It seems to me that there are always some questions that require a deeper understanding of some topics which one cannot acquire / learn until one has actually configured and used and thus truely understood. Good luck though.
If one has not tried to learn anything at all about the appliances then I cannot see how one could reasonably expect to pass exam VCS-277, unless perhaps one is somehow quite lucky with educated / random guesses.