Multiple choice technology

What would be the result of the below expression? Len(Arg1) where Arg1 is NULL

  1. NULL

  2. Empty

  3. Zero

  4. Causes Run Time Error
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C Correct answer
Explanation

The LEN() function in SAS returns 0 when applied to a NULL or missing value, not NULL itself. This is consistent with SAS treatment of missing values in length functions - missing values have zero length.

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