I have the empathy for new comers joining the team, because I'm thinking, no matter how good you were, when you joining a new team, you will and do need help. That's why I always do my best to help each and every new comer joining our team. But I'm astonished to find such good intention can backfires... 

I have this colleague, that when she joined our team, I could clearly tell that she was having a hard time picking up the speed (She taught programming before, but never actually coded anything). So I put in my 110% to make sure her ramp-up being as smooth as possible. I told her, "whatever you don't quite grasp, don't hesitate to ask me". However it backfired eventually, that she got so used to asking me questions, that she kept asking me even those pity ones, like "what was that command/function again?", and even "where is that file again?". i.e., she kept asking me of those things not because she don't understand, but simply because she doesn't care to remember or look up herself. 

She is in her fifties, so I quite understand she might easily forgot things. But being kept asked the same things over and over again really annoys me. That's my only pet peeve, and normally I'm not easily agitated. I gradually revealed my annoyance step by step to her. First as a joke, adding "don't use me as your small secretary" after answering her pity questions every time, but she continued doing so, until I was so annoyed and pull out my joker face, and talked to her seriously, "Look, I don't mind helping you at all, but would you please remember them/could you look up those trivial things yourself instead of asking me each time?". I've talked to her like this several times, but each time, her reply is, "did I? you are so over sensitive."

I tried to distant from her, and now she is complaining, you are so cold, and not helpful at all, you are not like this before. 

She never considers that she's bothering me to death and she shows no guilty-feeling at all when asking me those pity questions, and she now thinks it is my fault. How can I deal with it? Thanks