Alabama CDL knowledge test — any differences from the standard federal CDL exam?

Getting ready to take my CDL knowledge exam at the Alabama ALEA testing center and I've been wondering if there are Alabama-specific questions mixed in or if it's purely the federal FMCSA material. I've seen conflicting info online and want to make sure I'm not missing state-specific content.

Short answer from my research: The core CDL general knowledge exam is federally standardized through FMCSA — so the vehicle inspection, shifting, braking, and cargo content is identical across all 50 states. However, Alabama does add a section on state-specific traffic laws for the regular driver's license, and some of that overlaps into the CDL process for local and intrastate-only licenses.

For a standard interstate CDL, the federal content is what matters most. I've been using Alabama CDL general knowledge practice tests that mix federal standards with Alabama-specific scenarios, which seems like the safest coverage. The permit practice test format in Alabama is 50 questions with a 40-question passing threshold — same as most states.

My exam is next Tuesday. Any Alabama CDL drivers have tips on what the ALEA testers are particularly strict about during the skills test? I've heard the pre-trip inspection is where most people fail.