Updating interior-Hardwood, laminate, or vinyl for flooring?

[RubberDuckeeToo2]

Any idea how they are securing the flooring? Possibly glued with edge pin nails? looking at replacement of the carpet and going with hardwood in my 340 AJ

I did mine entirely with a good flooring glue. I think nails of any sort are problematic since they can work loose or worse yet, rust unless you use stainless.

Gene