Multiple choice technology mainframe

Suppose 3 generations of a GDG exist. How would you reference the 1 st generation in the JCL?

  1. Use GDG name(-3)

  2. Use GDG name(-2)

  3. Use GDG name(-1)

  4. Use GDG name(0)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

GDG (Generation Data Group) generations are referenced as: (0) = current/new generation, (-1) = most recent previous generation, (-2) = second most recent, etc. With 3 generations existing, they are (0), (-1), and (-2). The 1st generation (oldest) is (-2), 2nd is (-1), 3rd/most recent is (0). Option B is correct. Option A would reference a 4th generation that doesn't exist. Option C is the 2nd generation. Option D is the current/newest.

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