Independence Blue Cross Intern - Hourly interview questions

HR had contacted my school to see if there were any students available for co-op. There were no students available but I have a good link with career services at my school so I was told about the job therefore I applied online for it and sent an e-mail to HR saying thank you for thinking of the school and offering an opportunity to the students there like myself. After applying and sending the e-mail to HR I received a call for a interview within the next week. The interview was 30 mins long and with 2 managers. They reviewed my resume asked me basic questions of my knowledge of the accounting dept. Because I had prior experience of 1yr. they wanted to know what my work life was like and what I did for the company what softwares I used. Also good to have background in reconciliation, pivot tables, journal entries. They wanted to know what my schedule is like and how I would balance work and going to school full time. Besides asking me about what I did for the company I worked with before the managers were very friendly interview was very conversational. They pitched IBX to me as if they had already made up their mind about me and they wanted to hire me. They also talked to me about my future with IBX for after graduation. After my interview HR contacted me the following week offering me a position. I had to fill out a few forms and take a drug test within 42 hours of accepting the offer. It took 3 weeks for my drug test results to come back to my start date was pushed back by 3 weeks.