If you were charged with misdemeanor DUI, and a job application asks about misdemeanor charges without regard for disposition over a time frame that includes the charge at issue, then you would indicate that you were charged with a misdemeanor; If your obstruction of the roadway charge was under Penal Code Sec. 42.03, that's also a Class B Misdemeanor. The exact wording of the question can be significant - depending on the exact phrasing it may be honest to only speak of the obstructing charge and deferral, but we can't answer that for you as you didn't share the question.