How are EXPORT and REPRO files different
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EXPORT stores data in a compressed format. REPRO stores data uncompressed.
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EXPORT and IMPORT are terms that are part of the REPRO command so there is actually no difference
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EXPORT files contain the data and index portion of the data set. REPRO files contain only the data portion
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EXPORT files contain all of the data set components, including attributes. REPRO files contain only the data
EXPORT creates a backup file containing both data and index components, preserving the complete VSAM dataset structure. REPRO only copies the data portion. This distinction matters for recovery and migration - EXPORT maintains the full dataset including indexes, while REPO is a simpler data copy operation. Option A incorrectly describes compression differences, Option B falsely claims they're the same, and Option D incorrectly attributes component differences.
This is a VSAM/IDCAMS (mainframe) question. EXPORT creates a portable sequential file intended for later IMPORT to fully recreate the cluster — it preserves the data set's catalog information/attributes (definitions such as key length, record format, alternate indexes, etc.) along with the data, so the cluster can be rebuilt exactly. REPRO is a simple record-copy utility: it copies only the data records from one data set to another (or to/from a sequential file), without carrying along catalog attributes — the target must already exist or be defined separately, and any index is rebuilt from the copied records, not carried over as metadata. The marked answer ('EXPORT = data+index, REPRO = data only') captures part of the distinction but the more precise IBM-documented distinction is that EXPORT retains full attributes/catalog definition while REPRO carries only the data — i.e., option D is arguably the more textbook-accurate answer.