What should I do if the employer asks me about my relatives and friends when I apply?

This is to ask the local people for a guarantee in case you cause losses to the company in the future. So your relatives are your sponsors. Especially the sales business, you are generally required to provide it. You can ask the old business of the company if they have the same requirements. It's normal for everyone to do this. Follow normal procedures, and you are no exception.

Then run, little liar.