How do practice tests work exactly? Static or Dynamic

I'm studying for the CISSP exam and am interested in how the practice exams work exactly. There is one exam for CISSP that I see  does that mean that there is one test with 25 (or whatever the number is) discrete questions that are available in the same order if you try to take the practice test more than once or is there a dynamic mechanism for creating a new test each time you take one from a bank of CISSP related questions?
If the answer is the former (and maybe even if its the latter), are there other resources for taking practice exams for CISSP that you can recommend?
Thanks!

When you enter our practice exam for CISSP  choose the Custom Quiz option  this will show you the answer to the questions you are asking. :)
Notice you are seeing the total number of questions for each topic area that exists in the curriculum. This gives you a tremendous amount of control in the questions you face during a practice session.
I hope this helps and is what you were looking for...

@AnthonySequeira Fantastic! Thanks for the quick response!