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

Chapter 18: Reading Date and Time Values

1. SAS date values are the number of days since which date?

   1. January 1, 1900
   2. January 1, 1950
   3. January 1, 1960
   4. January 1, 1970

   Correct answer: c

   A SAS date value is the number of days from January 1, 1960, to the given date.
2. A great advantage of storing dates and times as SAS numeric date and time values is that

   1. they can easily be edited.
   2. they can easily be read and understood.
   3. they can be used in text strings like other character values.
   4. they can be used in calculations like other numeric values.

   Correct answer: d

   In addition to tracking time intervals, SAS date and time values can be used in calculations like other numeric values. This lets you calculate ...