问题:
A . EXPDP and IMPDP are the client components of Oracle Data Pump.
B . DBMS_DATAPUMP PL/SQL packages can be used independently of the Data Pump clients.
C . Oracle Data Pump export and import operations can be performed only by users with the SYSDBA privilege.
D . Oracle Data Pump imports can be done from the export files generated in the export utility of previous versions.
E . EXPDP and IMPDP use the procedures provided by DBMS_METADATA to execute export and import commands.
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