SAS Certification Prep Guide: Base Programming for SAS 9, Third Edition

Chapter 20: Creating Multiple Observations from a Single Record

1. Which is true for the double trailing at sign (@@)?

   1. It enables the next INPUT statement to read from the current record across multiple iterations of the DATA step.
   2. It must be the last item specified in the INPUT statement.
   3. It is released when the input pointer moves past the end of the record.
   4. all of the above

   Correct answer: d

   The double trailing at sign (@@) enables the next INPUT statement to read from the current record across multiple iterations of the DATA step. It must be the last item specified in the INPUT statement. A record that is being held by the double trailing at sign (@@) is not released until the input pointer moves past the end of the ...