Statistical Analysis System (SAS) Programming Certification Practice Exam

When date values are subtracted incorrectly in SAS, it can lead to an unexpected result. This is primarily due to the way SAS handles date values—the software interprets date differences as the number of days between two date values. If the dates are not formatted correctly or if they are manipulated in a way that SAS does not recognize as a legitimate date operation, the output can yield a nonsensical value or a number that does not accurately represent the intended difference. For instance, if you accidentally subtract a character string from a date value, SAS may convert the string in a way that leads to an erroneous calculation or an unexpected numerical result. Since SAS does not provide real-time error messages for such operations that simply yield nonsensical outputs, the integrity of the data analysis can be compromised, leading the user to erroneous conclusions. In contrast, the other options suggest scenarios that do not typically occur with incorrect date operations in SAS, such as automatically correcting the operation or ignoring it entirely, which SAS does not do in this context.