IMS DB Interview Questions and Answers

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IBM Information Management System (IMS) is a joint hierarchical database and information management system with extensive transaction processing capabilities.

  1. IMS DB questions updated at 01 Jul 10 in Category Mainframes and visited 1420 Times

IMS DB Questions and Answers:

1 :: What is the maximum of key fields and search fields allowed in a segment?

Key fields - Only 1

Search fields - No limitation
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2 :: What is the maximum number of PCBs allowed in a PSB?

Any number more than 1 (no limitation)
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3 :: What are the two ways in which DL/I interface can be invoked?

► By making a call to IBM supplied program CBLTDLI / ASMTDLI / PLITDLI
(most commonly used method) by - Passing a PCB, or Passing an AIB

► By invoking the EXEC-DLI CICS interface by Passing a PCB, or Passing an AIB
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4 :: How many root segments do we have per database record?

Only 1
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5 :: What is the maximum number of fields allowed per segment and what is the maximum number of fields per database?

Max. number of fields per segment = 255

Max. number of fields per database = 1000
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