Tips for hazmat written test

Just to let you all know. I past the hazmat test. The guy at the DMV had to check if my tsa background check was still valid. He said it's only good for 6 months but because it's my first time getting it added they wasn't sure. It was 30 questions can't get 7 wrong. I got 4 maybe 5 wrong. Most I saw was reworded from the practice test on here