US Postal Service interview questions

Took about 2 weeks to get an interview and I'm now in the process of doing a background check and a drug test. It was a lengthy interview session, started from 8am and ended (for me) around 12pm. When they said it may take 4-8hrs to be completed, they weren't joking. First they spend about 2hours going over the duties of the position, what is expected, you get the chance to correct your online app and then sign them. It was about 16 of us and they call you 2 by 2 in another room for the official interview which lasted about another half hour. After you sit with the interviewer you sit with a supervisor to convince her why they should hire you.