Multiple choice technology databases

What call is performed prior to a deletion call ?

  1. GU

  2. GHU

  3. GN

  4. GNP
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In IMS, to delete a segment, you must first establish exclusive control over it using a Get Hold Unique (GHU) call. This ensures no other programs can modify the segment while you're deleting it. The GHU call places a hold on the segment, which is a prerequisite for the subsequent D (delete) call. GU (Get Unique) retrieves without holding, while GN (Get Next) and GNP (Get Next Parent) are navigation calls.

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