Multiple choice technology mainframe

Which DD parameters are required ?

  1. Dsname, SPACE, UNIT

  2. Dsname, SPACE, RECFM

  3. Dsname, DISP, DCB, SPACE

  4. All parameters & Keywords are optional
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In JCL DD statements, ALL parameters and keywords are technically optional. The system will apply defaults if parameters are omitted (DSNAME might get generated from JOB name, DISP defaults to NEW/DELETE, etc.). While practical usage requires specifying certain parameters to create a useful dataset, the language itself doesn't mandate any specific parameter - the DD statement can be empty or minimal and still be syntactically valid.

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