The exact syntax for the REFDD Parameter
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REFDD=*.ddname
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REFDD=*.stepname.ddname
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REFDD=*.jobstepname.procstepname
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REFDD=*.jobstepname.ddname
The REFDD parameter in JCL references a DD statement for model DCB attributes. The syntax REFDD=*.ddname is correct where the asterisk refers to the current step and ddname is the DD statement to copy from. Options B, C, and D incorrectly include stepname or procstepname which are not valid in this context.
To answer this question, we need to understand the syntax for the REFDD parameter in a job control language (JCL) statement.
The correct syntax for the REFDD parameter is:
A. REFDD=*.ddname
This syntax specifies that the data set referenced by the DD statement with the given ddname should be used as input for the current step or job.
Let's go through each option to understand why it is correct or incorrect:
Option A) REFDD=*.ddname - This option is correct because it specifies that the data set referenced by the DD statement with the given ddname should be used as input for the current step or job.
Option B) REFDD=*.stepname.ddname - This option is incorrect because it includes the stepname in the REFDD parameter. The REFDD parameter does not require the stepname; it only requires the ddname.
Option C) REFDD=*.jobstepname.procstepname - This option is incorrect because it includes both the jobstepname and the procstepname in the REFDD parameter. The REFDD parameter does not require these names; it only requires the ddname.
Option D) REFDD=*.jobstepname.ddname - This option is incorrect because it includes the jobstepname in the REFDD parameter. The REFDD parameter does not require the jobstepname; it only requires the ddname.
The correct answer is A) REFDD=*.ddname. This option is correct because it specifies that the data set referenced by the DD statement with the given ddname should be used as input for the current step or job.