If you have a hit and run accident on your records, and you get it expunged, will it be expunged on your DMV records as well?

You should make a formal request with the DMV to remove this from your driving record and attach the expungement and proof of restitution to the victim. Depending upon how long ago this happened, it may already be off your record.

The accident will remain on your DMV record until it "drops off," and the action in the criminal court will not affect that. A so-called "expungement" doesn't really expunge anything in California. It is really a dismissal under Penal Code 1203.4, which adds a notation to the court's record saying your case was dismissed after successful completion of probation. Private employers are not supposed to ask about convictions that were dismissed under Penal Code 1203.4, or seek information about the dismissed cases on a background check, but the conviction remains a public record that anyone can access. You must still disclose the conviction when applying for state professional licenses, running for political office, and contracting with the state lottery.

It depends on your dmv.

Depends on your state's laws.