A NASM practice test is written by individuals who don’t actually work for NASM so they are compiling information based on experiences. These practice tests are close, but there is no way to ensure 100% accuracy since the NASM changes rapidly from test-to-test. Therefore, you won’t find NASM practice tests that exactly match the real thing, but that shouldn’t deter you from using them as a study method. Not only are the questions rotated out every test, but they also change the wording. But it makes sense because people would figure out a static test within months, so they need it to be changed to improve legitimacy. With that said, taking an NASM practice test will help prepare for the real exam since it still tests your knowledge of the material.