Statistical Analysis System (SAS) Programming Certification Practice Exam

Which statement prints a summary of all the files stored in a library named Area51?

1. proc contents data=area51._all_ nods;

2. proc contents data=area51 _all_ nods;

3. proc contents data=area51 _all_ noobs;

4. proc contents data=area51 _all_.nods;

The correct answer is: proc contents data=area51._all_ nods;

The statement that prints a summary of all the files stored in a library named Area51 is built around the PROC CONTENTS procedure, which is specifically used to display information about the contents of a SAS data set or library. In the correct option, "data=area51._all_" specifies that you want to look at all datasets within the Area51 library by using the special keyword "_all_". The inclusion of the "nods" option instructs SAS to suppress listing the dataset names in the output, focusing instead on presenting a summary of the attributes of the datasets. Using "_all_" is essential in this context, as it indicates that information from all datasets within the specified library should be retrieved. The underscore before "all" is necessary to ensure proper syntax in SAS. Additionally, the keywords and syntax in the correct option are strictly adhering to SAS conventions, which is vital for the successful execution of this command. The other options may contain syntax errors or deviations from the expected proper usage of PROC CONTENTS that would prevent them from functioning as intended. For example, missing punctuation or incorrect placement of keywords can lead to errors or the command not functioning as desired. Thus, this makes the designated choice the only accurate option to retrieve a summary of the