99. Which two statements are true regarding Oracle Data Pump? (Choose two.)

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.

Answer: AB  

答案解析：

参考：http://docs.oracle.com/cd/E11882_01/server.112/e22490/dp_overview.htm#SUTIL802

Data Pump Components

Oracle Data Pump is made up of three distinct parts:

• The command-line clients, EXPDP and IMPDP

• The DBMS_DATAPUMP PL/SQL package (also known as the Data Pump API)

• The DBMS_METADATA PL/SQL package (also known as the Metadata API)
  注：以上内容的意思是数据泵包含三个部分 ，DBMS_DATAPUMP，DBMS_METADATA，客户端命令行EXPDP and IMPDP  所以答案A EXPDP and IMPDP是客户端组建是正确的。                                                                                                                                   

The Data Pump clients, expdp and impdp, invoke the Data Pump Export utility and Data Pump Import utility, respectively.

The expdp and impdp clients use the procedures provided in the DBMS_DATAPUMP PL/SQL package to execute export and import commands, using the parameters entered at the command line. These parameters enable the exporting and importing of data and metadata for a complete database or for subsets of a database.

When metadata is moved, Data Pump uses functionality provided by the DBMS_METADATA PL/SQL package. The DBMS_METADATA package provides a centralized facility for the extraction, manipulation, and re-creation of dictionary metadata.

The DBMS_DATAPUMP and DBMS_METADATA PL/SQL packages can be used independently of the Data Pump clients.

参考至：http://blog.csdn.net/rlhua/article/details/14161137