This SUGI paper, which reports the results of a survey of managers about hiring SAS programmers, contains a compiled list of interview questions (at the end of the paper):
http://www.sconsig.com/tipscons/neilhoward_sugi25.pdf
The questions that you might be asked will, of course, depend on the job you're applying for. You might not encounter any of these questions or you might encounter different ones.
cynthia