单项选择题
A.tnsnames.ora must be on the client machine for local naming.
B.tnsnames.ora must be removed from the server for the connection to work.
C.tnsnames.ora must be on both the client and server machines for local naming.
D.tnsnames.ora is not required for local naming; the problem was not fixed by copying the file to the client.
单项选择题 You want to perform in incomplete recovery of your database. You plan to use these commands to recover your database： SET UNTIL TIME = ’2000-12-09：11：44：00’； RESTORE DATABASE； RECOVER DATABASE； How should the commands be executed？ （）
单项选择题 When importing a table into a database，the import process performs these tasks： 1. Triggers are imported. 2. Data is imported. 3. New tables are created. 4. Indexes are built. 5. Any bitmap， functional， and/or domain indexes are built. 6. Integrity constraints are enabled on the new tables. Which option shows the tasks in the order in which they are performed？（）
多项选择题 ThedatabaseisrunninginNOARCHIVELOGmode.Adatafileislost.Whichtwoarevalidoptionsforrecover？（）