The examiner is supposed to cover that, and the CFI who signs off your 8710 should also review your mistakes.

I would definately review the stuff you missed, especially if there were particular areas where you missed multiple questions.

If you're career oriented, be aware that folks who hire entry-level pilots usually will look at written test scores, and you want to be 95%+. Since the answers are all available, lower scores indicate lack of preparation and/or discipline. Don't worry about your PPL test, nobody will care about that, just shoot for high-90's on all the other writtens.