December 2014
Intermediate to advanced
858 pages
40h 10m
English
Content preview from SAS Certification Prep Guide, 4th Edition
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Chapter 21: Controlling Data Storage Space
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Correct answer: dThe descriptor portion of an uncompressed data file is always stored at the end of the first data set page. New observations are always added to the end of the data set, and deleted observation space is neither tracked nor reused.
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Correct answer: bThe descriptor portion of a compressed data file is always stored at the end of the first data set page. If you specify REUSE=YES, SAS tracks and reuses deleted observation space within a compressed data file. Therefore, every observation in a compressed data file can be a different size. Compressed data files do have a larger overhead than uncompressed data files.
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Correct answer: cUse the LENGTH statement to assign a reduced ...
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