I could understand not knowing if its a WII or DS game. Walmart is bad to put people in departments that they know nothing about though. Best was when my Dad was asking about a gun in sporting goods and this little old lady told him how she hated guns and knew nothing about them.
Walmart doesn't care who they put where. Having worked there for many years, I can tell you that if an associate in any department knows anything about the products in the store it is by sheer luck. When you are hired at Walmart, you receive no job training outside of a few brief flash applications on a computer in the back room. If a customer asks you a question about something you don't know about, you either tell them you don't know or bullsh*t your way out of it. Although 99 times out of 100 they will ask you a common sense question that any idiot should know already, if they aren't simply asking you where the bathroom is.
The real problem is when you are expected operate machinery (forklifts, cheap old fashioned paint mixers, handheld computer terminals, cash registers) and know all the proper procedures for every conceivable situation the day you are hired, and do it all for $7 an hour(your bosses will resent you for even making that much, and do everything in their power to make sure you do not get full time benefits or overtime pay)-- Which is why Walmart has one of the highest turnover rates in the country.
You will find yourself running around like a headless chicken with the workload that 5 years prior was handled by a dozen different people. Should you have any questions on what you're supposed to do, you will simply be told that you are expected to already know, or they will find somebody who does. So figure it out, and pray you don't @#%^ it up.