I want to find out the last time my iphone was connected to a computer?

I recently got my screen fixed and i want to know whether they accessed my phone. There are a few reasons why i'm suss, one being that the lady asked for my screen pin. I asked why she needed it and she explained that she wanted to get some numbers out of it or something. So I want to find out the last time my iphone was connected to a computer, not necessarily connected to itunes but computer. I guess another question would be when was the last time my applications were accessed? Because that way i'd know when it was accessed.
other information
Phone took 45 mins to repair

I don't exactly know WHEN you could see it was accessed, but I know that you could double click the home screen button (when it is already at home or in-app) and it'll show you the last apps accessed.So, if you remember what app you use last, you'll be able to see what she used.

Dude she needed you PIN number and serial number, apple employees are watched when fixing a phone by a supervisor/manager. Being an apple employee is very demanding, very strict and you can't go past the line or youre fired.