Multiple choice technology databases

what are the control blocks in IMS ?

  1. DBD

  2. PSD

  3. PSB

  4. SSA
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A,C Correct answer
Explanation

The control blocks in IMS are DBD (Database Description) and PSB (Program Specification Block). DBD defines the physical structure of the database including segments and fields, while PSB defines how a program can access the database. PCB (Program Communication Block) is part of PSB, not a separate control block. SSA (Segment Search Argument) is a parameter used in calls, not a control block.

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