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Q:

Assuming that the DEFINE JCL is not available, how do you get info about a VSAM files organisation?

Answer

Use the LISTCAT command.

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Subject: Mainframe Interview

Q:

What is the meaning of VSAM RETURN-CODE 28?

Answer

Out of space condition is raised.

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Q:

What is the IDD in IDMS?

Answer

IDD is the Integrated Data Dictionary. It contains information about the elements, record types, sets, maps and dialogues within the database.

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Subject: Mainframe Interview

Q:

If you are current on the owner of a set, what is the difference between an obtain next and obtain first in IDMS?

Answer

No difference. There is a difference between obtain first and obtain next for an area sweep, but not when current on the owner in a set.

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Q:

What is the meaning of Copy IDMS Subschema-Binds?

Answer

It generates a bind run-unit and binds all the records for the sub-schema the program is referencing.

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Q:

Is there a application program coding difference between local and central version mode in IDMS?

Answer

No. The mode is specified via the SYSCTL DD card in the JCL.

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Q:

What are the differences between COBOL and COBOL II?

Answer

There are some differences:


COBOL II supports structured programming by using in line Performs and explicit scope terminators. It introduces new features (EVALUATE, SET. TO TRUE, CALL BY CONTEXT, etc). It permits programs to be loaded and addressed above the 16-megabyte line .  It does not support many old features (READY TRACE, REPORT-WRITER, ISAM, etc.). It offers enhanced CICS support.

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Q:

What COBOL construct is the COBOL II EVALUATE meant to replace?

Answer

EVALUATE can be used in place of the nested IF THEN ELSE statements.

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