It is basically what the FBI has on you. I got asked about something that happened years back in the 70's. I was amazed, but also truthful. If they ask you a question tell them the truth to the best of your ability. You can say that it was a long time ago, and you may not remember all the details, and they will likely be OK with that. Just tell them the truth, they already know the answer. After my question from the 70's, I had a friend in law enforcement run my FBI check, sure enough, it was there.