35、choose three
Which three statements are true about Oracle Data Pump?
A) Oracle Data Pump export and import operations can be performed to move data across different database releases.
B) Oracle Data Pump export operations invoked from the clients that are connected remotely by using a connection string, create Data Pump files on the client file system.
C) Oracle Data Pump export and import operations can be performed only by users with the SYSDBA privilege.
D) DBMS_DATAPUMP PL/SQL packages can be used independent of Data Pump clients.
E) A directory object must exist and a user performing an EXPDP or IMPDP operation must have read and write permission on that directory object.
Answer：ADE
（解析：數據泵工具是一個非常靈活的數據遷移工具，可以支持不同的數據庫版本；在導出的時候directory必須是當前存在的，同時要有讀寫的權限，在expdp時可以不指定directory目錄，但是需要指定dumpfile=ocm_dir:emp.dmp logfile=ocm_dir:emp.log；遠程的客戶端可以導出服務器數據庫的表，但是導出來的dump文件是放在服務器端的目錄下，而不是客戶端的目錄下，因爲directory制定的是服務器端的目錄，而不是客戶端的目錄。來自3組：1015267481）