why do we use vsam file thn seqential files ?
Answer Posted / vijay
1)Record Insertion inbetween the existing recored is
poosible.
Where as in PS file we can add only at the end
2) we read record in any order
were as in PS it is possible to read from 1st , 2nd ,
3rd... like that
| Is This Answer Correct ? | 7 Yes | 1 No |
Post New Answer View All Answers
What are the steps involved in access method services?
explain in brief how you can create a vsam file?
What is the main function of key-sequenced data set?
What is a ca split?
Under idcams, multiple functions can be executed, each of which returns a condition code. What will be the condition code returned to the operating system?
why ci and ca splits are not possible in esds and rrds?
Can you delete vsam files with the delete option of the disposition parameter of jcl?
explain in brief what are the 3 types of vsam files?
What is the difference between lds and esds?
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 to get the last record in vsam file in cluster?
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.
what will happen if there is no secondary allocation made for datasets?
Explain the biggest disadvantage of using a vsam dataset?
is delete operation supported in an esds? Is rewrite operation possible in esds?