Database Hierarchical Question: Download Database Hierarchical PDF
Explain the main control blocks available in IMS DB?
Answer:
There are three control blocks (also known as DL/I control blocks)
► Database Description (DBD)
► Program Specification Block (PSB)
► Application Control Block (ACB)
► Database Description (DBD)
► Program Specification Block (PSB)
► Application Control Block (ACB)
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