Multiple choice technology mainframe

Which of the following equations are correct?

  1. DISP=(,PASS) is equivalent to DISP=(NEW,PASS,KEEP)

  2. DISP=(,,KEEP) is equivalent to DISP=(NEW,DELETE,KEEP)

  3. DISP=(,,CATLG) is equivalent to DISP=(OLD,CATLG,CATLG)

  4. DISP=(OLD,,) is equivalent to DISP=(OLD,KEEP,KEEP)
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B,D Correct answer
Explanation

In JCL, missing DISP parameters default based on status. For DISP=(,,KEEP), status defaults to NEW, and normal disposition defaults to DELETE, matching (NEW,DELETE,KEEP). For DISP=(OLD,,), normal and abnormal dispositions default to KEEP (since status is OLD), matching (OLD,KEEP,KEEP).

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