That is this test, which is for v9 not v9.2:
There is also this one that is for v9.2:
The tests should be similar, but I would probably recommend working to get certified on v9 first before trying v9.2
Of course, now that I read the test info more closely, it looks like the v9.2 certification has more questions, allows a longer time to take the test, and allows a lower score to get a passing grade. All of those factors might make C2150-521 easier than C2150-508
This might be helpful: BigFix Documentation & Resources
Also, @BigFixNinja has some recorded presentations about troubleshooting BigFix stuff.