To answer this question, we need to understand the syntax and options of the PROC CONTENTS statement in SAS.
The PROC CONTENTS statement in SAS is used to display information about the variables and attributes of a SAS dataset. It can be used to print a summary of all the files stored in a library.
Let's go through each option to understand why it is correct or incorrect:
A. proc contents data=area51.all nods;
This option is correct because it specifies the library name "area51" and the keyword "all" to indicate that information about all the files in the library should be included in the summary. The keyword "nods" is used to suppress the display of variable details.
B. proc contents data=area51 all nods;
This option is incorrect because it is missing the period (.) after "area51" and before "all". The correct syntax is to include the period to specify the library name.
C. proc contents data=area51 all noobs;
This option is incorrect because it uses the keyword "noobs" instead of "nods". The correct keyword to suppress the display of variable details is "nods".
D. proc contents data=area51 all.nods;
This option is incorrect because it includes a period before "nods" without the underscore () before it. The correct syntax is to include the underscore () before the period to indicate that it is part of the keyword "all".
The correct answer is A. This option is correct because it specifies the library name "area51" and includes the keyword "all" and "nods" to print a summary of all the files stored in the library.