某企业的预期年收益为30万元，该企业的各单项资产的评估值之和为90万元，企业所在的行业的平均收益率为20%，并以此作为使用的资产收益率，则据此评估商誉的价值为（）。 20。 30。 50。 60。
You want to perform a backup of your database to tape. Which backup format can you use？（） backup set only。 image copy only。 only user-managed backup。 both image copy and backup set。 only incremental image copy backu。
You deployed a Java EE Shared Library and want to use it from an application that is also deployed on the same cluster. Which two manifest attributes must be specified at a minimum with corresponding values in the deployment descriptor of the application that requires?（） Implementation-Version。 Specification-Version。 Extension-Name 。 Specification-Vendor。 Implementation-Vendor。
Your alert log file has the following information： Tue May 25 17：43：38 2004 ORA-00060： Deadlock detected. More info in file /u01/app/oracle/admin/ORCL/udump/orcl_ora_3173.trc. What would you do to ensure that database is still running correctly？（） examine the trace file and kill the session that caused the deadlock。 examine the trace file and kill both the sessions responsible for the deadlock。 examine the trace file for details and ask the user who caused the deadlock to roll back the transaction。 examine the trace file for details and remember that deadlocks are resolved automatically by Oracle database。 examine the trace file for details and use the Undo Advisor to rollback the transaction that caused the deadlock。
面对竞争，企业一般会采取哪些市场行为？
You plan to move data from a flat file to a table in your database. You decide to use SQL*Loader directpath load method to perform this task. The table in which you plan to load data is an important tablehaving various integrity constraints defined on it.
Which constraints will remain enabled by default during this operation（）
