Answer Posted / vaibhav
vsam catlog is used to resides on direct access
method...its contain location of dasd..sape amount
allocatted by dataset...attribute..address..
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what is meant by dirty read in vsam?
What is the difference between lds and esds?
What is the main purpose of having user catalog in vsam?
In a KSDS file, key is missing for one record. How to insert the key for that particular record from back up file. Is there any sorting needed for the back up file before the key insertion?
How do you define an altindx?
Yes. Because the alternate key would first locate the primary key, which in turn locates the actual record. Needs twice the number of I/Os.
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is delete operation supported in an esds? Is rewrite operation possible in esds?
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what do you mean by the cobol record key clause in vsam?
What is the main function of key sequenced data set in vsam?
is it required that primary key values have to be unique? Do alternate key values have to be unique?
explain in brief why do vsam take more disk space than other utilities?
