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16.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 indedendently 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 Original Export Release E. EXPDP and IMPDP use the procedures provided by DBMS_METADATA to execute export and import commands Answer: AB
数据泵是基于数据库服务端的，运行在数据库内部。
Oracle数据泵组成部分：命令行客户端（expdp和impdp）、数据泵API(DBMS_DATAPUMP)、元数据API(DBMS_METADATA).
Expdp和impdp调用数据泵API和元数据API共同完成数据的迁移。数据泵API执行表中数据的导入导出；元数据API完成元数据的装载和卸载。
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17.Identify the two situations in which the alert log file is updated with details. (Choose two.) A. Running a query on a table returns "ORA-600: Internal Error" B. Inserting a value in a table returns "ORA-01722: Invalid Number" C. Creating a table returns "ORA-00955: name is already used by an existing object‘ D. Inserting a value in a table returns "ORA-00001: unique constraint (SYS.PK_TECHP) violated." E. Rebuilding an index using ALTER INDEX ... REBUILD fails with an error "ORA-01578: ORACLE data block corrupted (file # 14, block @ 50)." Answer: AE
alert日志中记录：
Critical errors (incidents)
Administrative operations, such as starting up or shutting down the database, recovering the database, creating ordropping a tablespace, and others.
Errors during automatic refresh of a materialized view
Other database events
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18.Which two statements are true about alerts? (Choose two.) A. Clearing an alert sends the alert to the alert history B. Response actions cannot be specified with server-generated alerts C. The nonthreshold alerts appear in the DBA_OUTSTANDING_ALERTS view D. Server-generated alerts notify the problems that cannot be resolved automatically and require administrators to be notified Answer: AD
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原文地址：http://www.cnblogs.com/huanhuanang/p/5338322.html
