Which test(s) does SPSS use in a multiple regression analysis?

#1
Hello,

Which test(s) does SPSS use in a multiple regression analysis (MRA)? We can load a data table into it with data types ranging from categorical to continuous, but SPSS doesn't seem to mind. Does that mean that it automatically switches to nonparametric tests if need be, for its MRA?
 
#2
I believe the default test is least squares regression, or sometimes called ordinary least squares (OLS). Not sure if that answers oyur question.