Which three are prerequisites for successful execution …

Examine the following impdp command to import a database over the network from a pre-12c Oracle database
(source):

Which three are prerequisites for successful execution of the command?

A.
The import operation must be performed by a user on the target database by a user with the
DATAPUMP_IMP_FULL_DATABASE role, and the database link must connect to a user with the
DATAPUMP_EXP_FULL_DATABASE role on the source database.

B.
All the user-defined tablespaces must be in read-only mode on the source database.

C.
The export dump file must be created before starting the import on the target database.

D.
The source and target database must be running on the same operating system (OS) with the same
endianness.

E.
The impdp operation must be performed by the same user that performed the expdp operation.

Explanation:
In this case we have run the impdp without performing any conversion if endian format is different then we have
to first perform conversion.