Multiple choice technology mainframe

What is the keyword sub parameter that can be used in the DD operand to repeat the unit specification that is already mentioned for a dataset in any previous DD statements?

  1. UNIT=LIKE ddname

  2. UNIT=SER ddname

  3. UNIT=AFF=ddname

  4. UNIT=*.& ddname
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C Correct answer
Explanation

In JCL, UNIT=AFF=ddname (Unit Affinity) assigns a dataset to the same physical unit or device group allocated to a previously defined DD statement, optimizing device utilization. Other choices represent invalid JCL syntax for this purpose.

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