In SAS, what is a key characteristic that differentiates a permanent dataset from a temporary one?

The distinguishing feature of a permanent dataset in SAS is that it can be accessed after the session ends. When you create a permanent dataset, it is stored in a specified library, allowing you to retrieve it for future sessions. This is particularly useful for data that you wish to analyze over time or share with others, as it remains available even after the SAS session is closed.

In contrast, temporary datasets, which are stored in the WORK library, exist only for the duration of the SAS session. Once the session ends, these temporary datasets are automatically deleted and cannot be accessed later. This fundamental difference highlights the importance of choosing the right type of dataset based on your data management needs.

The other characteristics mentioned are not defining features of permanent datasets: they can be modified just like temporary datasets; they do not inherently imply any size restrictions; and permanent datasets do not have to be created specifically in the WORK library, which is dedicated to temporary datasets.