In general the DDM is part of a single Adabas file and we
the programmers play around the views of DDMs.
It is possible that there can be multiple views of a same
file, but I never heard that there can be one DDM from
multiple files.
What is a segment in IMS?
What is PCB?
What is PSB?
Which languages does IMS support / application program languages?
What are the main control blocks available in IMS DB?
What is DBD?
What information does a PSB contain?
How can a job send a status message to a TSO user at the completion of a job?
What is the function of JOB statement in JCL?
A DD statement has 2 types of parameters. Name them?
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