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Q. If there is a situation, where we need to code more than 255 steps in a JOB?
A. We need to split jcl into two jcls , at the end of the first jcl check the condition code and initiate the second jcl.
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QSAM files can be processed in reverse order using REVERSED keyowrd.
Use REVERSED option of the OPEN statement to process files in reverse order. The file is positioned at the end, and READ statements read the data records in reverse order, starting with the last record. The REVERSED option is supported only for files that have fixed-length records.
We can process VSAM Key Sequenced Data Set (KSDS) via an alternate index in reverse sequence, the order in which VSAM returns records is not the reverse of the order in which the records are returned when the same data set is processed in a forward sequential manner.
Reverse order processing depends on how data stores for an alternate index.
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