Statistical Analysis System (SAS) Programming Certification Practice Exam

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How long do librefs remain in effect?

  1. until the LIBNAME statement is changed

  2. until the LIBNAME statement is canceled

  3. until the SAS session ends

  4. All of the above

The correct answer is: All of the above

The duration of librefs, or library references, in SAS is influenced by various factors, making the assertion that they remain in effect until any of several conditions are met accurate. Librefs will remain active during the current SAS session, which means they are available until the session is terminated. Additionally, if a LIBNAME statement is explicitly canceled or if a new LIBNAME statement is issued that alters the library reference of the same libref, that change will take effect accordingly. Thus, the correct response encompasses all scenarios: the librefs are effective until the specific LIBNAME statement is altered, canceled, or the session itself comes to an end. This comprehensive understanding highlights the flexibility and management of library references within a SAS programming environment, allowing users to manipulate data with precision as their analytical needs evolve.

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