SAS Certified Specialist: Base Programming Using SAS 9.4

A programmer needs to read a comma-delimited text file into a SAS data set named WORK.SALES, overwriting any existing data set with that name. The file has some numeric columns with values that only appear as characters in early rows. Which PROC IMPORT features should be used to correctly read the file and ensure the output data set is replaced?

A SAS programmer wants to make a permanent SAS library accessible in the current session and then programmatically list the data sets and variable attributes contained in that library without opening each data set. Which two tasks best accomplish this?