Assistant store manager or HR usually do the initial interview. They essentially go over the resume as it was completed online, and question you about the relevant topics, such as employment history.
Then they ascertain how you would respond to challenges, such as difficult customers.
Interview is quite informal, with the focus being on how well you can communicate.
After this, they collect a DNA sample as part of the drug testing, and then finally inform you that there is a full background check, which takes anywhere between 3 days and a business week.