Answer Posted / raghu chukkapalli

Homogeneous copy is done when the source and target system
are on the same OS and Databse.
Heterogeneous Copy is done when the source and target
system differ either in OS or Database. Any ONE difference
needs a heterogeneous copy.
Homogenous copy is done by export/import technique.
Heterogenous copy is done by system migration. It is same
as export/import except that it will ask for target OS and
DB type and needs a key to be entered.

Hope it helps.
Raghu Chukkapalli.

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