Multiple choice technology

Which of the following ab initio functions are used to find NULL values

  1. Is_valid()

  2. Is_null()

  3. Is_blank()

  4. Is_defined()
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B,D Correct answer
Explanation

Is_null() specifically checks for NULL values in Ab Initio. Is_defined() checks whether a value is defined (not NULL). Both are valid for NULL checking, though they work oppositely. Is_valid() validates data type/format, and Is_blank() checks for empty/blank strings.

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