The question, "What do you do now?" is the one we normally use to ask about a person's current job. The answer will be, "I'm a driver" or, possibly "I drive". With driving jobs, we are normally more specific: "I'm a chauffeur/lorry driver/taxi driver".
Gee, LOL, for some reason, I thought they studied Present Continious Tense :-) The asker's question is a bit ambiguous! Didn't really take it that way, strange enough...