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If he pleads guilty or no contest (nolo contendre), it will result in a conviction and will go on his record. The only way the charge would not go on his record is if he pled not guilty and won the trial.
If this is his first run in, jail time is not likely - probably a minimal fine and probation for 6 months.
If he does plead guilty/no contest, he can likely file a petition for expungement to remove the conviction from his record after a certain time has passed.