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How to DEBUG A IDMS BATCH COBOL PROGRAM
Does anyone know how to set up debugging parameters in JCL of a IDMS BATCH COBOL program?
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What is the difference between a schema and a subschema?
The schema is the physical arrangement of the data as it appears in the DBMS. The subschema is the logical view of the data as it appears to the application program.
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What is the meaning of the return codes 0307 and 0326?
0307 is end-of-set and 0326 is record not found.
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Advantages of IDMS
What is the advantages of using IDMS compared to other database systems?
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What is an OOK-Rec?
An OOK-Rec is a one of a kind record set, used to get to another record set
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Explain the difference between record occurrence and record type?
A record occurrence is the instances of a record; it is the smallest addressable unit of data. A type is the description of a record; there need not be any occurrences.
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What is the purpose of a READY?
The READY prepares a database area for access by DML functions.
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What is an area sweep and when is it used?
An area sweep accesses records on the basis of the physical location in a database area. It can be total, meaning a record by record search of the area, or it can be of occurrences of records of a specific type.
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What is the difference between local and central version operating modes?
In local there is no IDMS System running above the DBMS. It is the more efficient mode but lacks the recovery and integrity facilities of the central version (CV) control program. In CV many application programs access the database through a single copy of the DBMS.
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What is a page?
A page is the smallest unit of storage in an IDMS database.
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When you are obtaining next within a set and get a end of set return code, on what record are you now current?
You are current on the owner.
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IDMS set of occurances
In IDMS which of following is true for any set of occurances?1. It may have zero owner instances.2. It must have one and only one owner instance.3. It must have atleast one member instance.4. None
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What does a COMMIT statement do?
It writes a checkpoint to the Journal File and releases any record locks.
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How does IDMS insure data integrity?
IDMS uses record locks to prevent another run-unit from updating the same record.
IDMS Interview Questions
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