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How Vsam was evolved? What was the equivalent file for
ESDS,KSDS and RRDS prior to evolution? What were their
disadvantages of those file which leads to evolution of
ESDS,KSDS and RRDS files ?
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Answer / anand r
ESDS
in batch it acts like a flat file
organizanition-sequential
Accessmode is sequential
in online we can read and write the records random manner
by using the key field
KSDS
Access mode: sequential,random and dynamic is possible
like indexed file
RRDS:
like KSDS we can use all the access modes and records are
accessed using RID (record identification No) thats
relative key
| Is This Answer Correct ? | 2 Yes | 3 No |
What is the difference between PS file and VSAM file?
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Explain the function of the relative record data set?
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Under IDCAMS , multiple functions can be executed, each of which returns a cond code. What will be the condition code returned to the operating system ?
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