Multiple choice technology databases

What is the maximum no. of PCBs that can be defined in a PSB?

  1. 255

  2. 1000

  3. 256

  4. 15
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A Correct answer
Explanation

A PSB (Program Specification Block) in IMS can define a maximum of 255 PCBs (Program Communication Blocks). This is a system limitation in IMS architecture. Each PCB represents a view into a database or a communication pathway, and the 255 limit constrains how many different database views a single program can simultaneously access.

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