Virtual storage access method (VSAM) Question:

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What more info you should give in the DD statement while defining the next generation of a GDG?

VSAM Interview Question
VSAM Interview Question

Answer:

Give (+1) as the generation number, give (new, catlg) for disp, give space parameter, can give the DCB parameter if you want to override the DCB of the model dataset.

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Assuming that the DEFINE JCL is not available, how do you get info about a VSAM files organisation?Suppose 3 generations of a GDG exist. How would you reference the 1st generation in the JCL?