Question-: Setting System options applies to?
Answer: Entire active SAS session and not to the specific program.
Question-: If you want to process only observations between 3 and 10, how can you control that?
Answer: We can control this using OBS= and FIRSTOBS= options. In this case we would put FIRSTOBS=3 and OBS=10. Hence, it would start processing the 3rd observation go until 10th observations.
Question-: Can I override the system option in the current session for specific data step?
Answer: Yes, we can do. For a particular data step by putting them in parenthesis at the end of statement for example as below. proc print data=he_sas.he_data(firstobs=3 obs=10);
Question-: While using the SORT procedure, how the missing values are treated by default?
Answer: By default, missing values are treated as smallest possible values.