Really depends what they mean by "print" (ie, I think its a silly question for an interviewer to ask).

dbms_output does not really "print". It simply stores data in an array, and sqlplus *know* this. So when a plsql call is finished, sqlplus looks inside that array and if there is anything present (and 'serverout' is on) retrieves it and puts it on the screen.

So alternatives could be:

1) store the info in a global temporary table, do a select to fetch it
2) store the info in a plsql nested table, do a select to fetch it
3) use utl_file to write to a file

Hope this helps.