A DUI is not a traffic violation. It is a criminal offense. A "traffic violation" is a non-criminal infraction, such as speeding.
If the question is, "have you been arrested, cited, charged, indicted, fined, or imprisoned..." then you must answer "yes" because you were both arrested and charged with DUI.
All comments made by the attorney are mere statements of opinion and are not intended to be interpreted as legal advice. There is no attorney-client relationship formed as a result of this comment.
I can't tell if you "have to" answer this question, but assuming that you do, the honest and correct answer would be "yes"