Answer / anup

CONVERSION:- One time data tranfer (normally BDC)

INTERFACE :- Periodic activity where two systems
communicate (SAP-SAP, SAP-Non SAP)

Answer / ravi

both methods belongs to BDC . Interface means transfering
data between two systems. CONVERSION one time data transfer.

if it wrong please inform me.

Answer / p.lokesh

We can say BDC is Conversion and BAPI is an Interface.
BAPI we can interactive with other systems apart from that
we can upload and download data.
where as BDC is no chance of interaction. It simple uploads
and downloads the data from flatfile to DB or Vice-versa.

Answer / indranil

Interface- Data transfer between two existing systems(SAP<->SAP, SAP<-->non-SAP). This is done when both the systems will exist in future. BAPI is interface.

Conversion- One-time data load from legacy system to SAP system. This is done when the legacy system wont exist in future. BDC is conversion.

Answer / rams

we will use interfaces to comunicate between two systems
i.e sap-sap or sap-nosap.

using Idoc's, and RFC's we will comunicate between two
systems

for converting leagcey data to sap we will write conversion
programs

using BDC's and Bapi's we write conversion programs

Answer / narendra

CONVERSION-LEGACY SYSTEM 2 FLAT FILE.
INTERFACE- FLATFILE 2 SAP DB.

Answer / prashant

I think interface means transfering data from flat file to
the internal table and conversion means transfering data
from internal table to SAP system

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