A lot of life insurance companies, at least in the U.S., do oral testing for nicotine use. If they find it, then they charge you a higher premium for it.
However, this is a written question and if the word "cigarette" and "smoking" are used then no you've not smoked a cigarette, it's a simple as that. How could you have smoked one when you haven't inhaled any smoke? Words mean things and you cannot have smoke without first having fire.