Walmart Sale Associate interview questions

For starters, I got an interview because I knew someone who worked there. The odd thing was that they did not call me and let me know that I had an interview. Instead, they told the person I knew about my interview and he was expected to pass the information along. Very unprofessional. I was a little bit late arriving to the interview and I still had to wait roughly 30 minutes (probably more) before my interview started. After the interview, some guy came to tell me about the specific position and told me I had the job as long as I took and passed a drug test within 24 hours of the interview.