Answer / Aishwarya Jaiswal

To compare two files on the mainframe and write matching records to one file while writing unmatched records to another, you can use SORT/MERGE:
1. Sort both input files using SORT.
2. Use MERGE to merge the sorted files, comparing each record based on a common key field.
3. Write output files as desired: matched records in one file and unmatched records in another.

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