Lots of behavioral questions, especially hypothetical type questions. Lots of "describe a time when ___" type questions Be prepared to discuss your strengths and weaknesses. Interviewers are usually on the team you will be working on and quite nice.
I applied through other source. The process took 3 months. I interviewed at Sam's Club
Interview
I got the internship from a job fair. I interviewed for either a Sams club or Walmart internship. I told them I would rather have the Sams club internship so that is what they ended up giving me.