I have a DUI arrest from 1993 that was Dismissed -Nolle from the state of CT. An employee form is asking for my plea -is it not guilty or no plea?

I am filling out an employment form that asks the disposition and plea. I know the disposition of my case (nolle/dismissed) but since I never went to court, I am not able to get information from the court because of how old it is on whether I made a plea. Is it possible I did not? I received a DUI, took a course and then it was dismissed. My question is in reference to what the "pleas" are in this type of case? Thanks for any help.