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

Chapter 21: Reading Hierarchical Files

1. When you write a DATA step to create one observation per detail record you need to

   1. distinguish between header and detail records.
   2. keep header data as a part of each observation until the next header record is encountered.
   3. hold the current record so other values in the record can be read.
   4. all of the above

   Correct answer: d

   In order to create one observation per detail record, it is necessary to distinguish between header and detail records. Use a RETAIN statement to keep header data as part of each observation until the next header record is encountered. You also need to use the @ line-hold specifier to hold the current record so other values in the record can be read.
2. Which ...