Answer Posted / kalyan rakesh

VSAM groups logical records into blocks called control
interval.
control intervals are inturn grouped into control areas.

A control interval consists of 1)data records
2)free space
3)unused space
4)control information of
a)RDF
b)CIDF
collection of adjacent CI s is CA.

What are the different commands used in idcams for vsam?

991

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is it required that primary key values have to be unique? Do alternate key values have to be unique?

999

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Why is it required to have a keyed directed retrieval?

971

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what do you mean by a vsam slot?

940

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what will happen when you try to open an empty vsam file in a cobol program for input?

989

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what is the meaning of each of the values in shareopts(2 3)?

963

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what is meant by s0c-07 system abend codes?

995

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Explain the device independent method to indicate where a record is stored?

865

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Is it slower if you access a record through alt index as compared to primary index?

976

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What is a ci split? What is a ca split?

1117

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What is the difference between lds and esds?

983

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what are the codes returned by the ams (access method services) command during the execution in vsam?

1223

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What is the purpose of control intervals in vsam?

956

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Define free space?

994

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name a few common vsam status codes?

991

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