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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 |
explain in brief why do vsam take more disk space than other utilities?
Common VSAM Error conditions and codes
Alt key is used for what type of vsam file
how do you define an altindx ? How do you use altindxs in batch, cics programs?
What is the maximum record length for the VSAM dataset?
name the utility program closely associated with vsam?
What is the meaning of dynamic processing?
What is a path?
in a cobol select statement, can you tell what is the organization for a ksds?
What happens when you open an empty VSAM file in a COBOL program for input?
On which datasets You can have ALT INDEX?
What is the Difference between LDS & ESDS ?
COBOL 
