You work as a database administrator for Supportcenter.cn. While granting a role， SELECT_CATALOG_ROLE， to a user， SupportCenter， using Oracle Enterprise Manager 10g Database Control， you have cleared the DEFAULT check box. What will be the result？（）

单项选择题Exhibit， error You work as a database administrator for Supportcenter.cn. When you try to connect to the database， you get an error （See exhibit）. What could be the possible reason for getting such an error？（）

A.Database is not open
B.Listener is not running
C.Service name is not correct
D.Wrong port number used in URL
E.Usersysdoes have themediaprivilege

单项选择题YouworkasadatabaseadministratorforSupportcenter.cn.Yourdatabaseisfunctional.Oneofthediskscontainingamirroredredologmemberhasbadsectorsinit.Youareunabletofixthedamagedfile.Howdoesthelossofaredologmemberaffecttheinstanceofthedatabasethatiscurrentlyrunning？（）

A.The instance would normally abort.
B.The instance would not be affected.
C.The instance would be invalid， so would have to be aborted.
D.The instance would remain open， but the LGWR process would fail.
E.The instance would remain open and would automatically create the missing file

单项选择题YouworkasadatabaseadministratorforSupportcenter.cn.Inyourorganization，youhavefourdatabases，SupportCenterDB01，SupportCenterDB02，SupportCenterDB03，andSupportCenterDB04，whicharelocatedinBerlin，Frankfurt，Rammstein，andMunichrespectively，andwhichwerecreatedusingDatabaseConfigurationAssistant（DBCA）.Youwanttoperformadministrativetasksonthesedatabasesthatincludestartupandshutdown，takingregularbackups，andsoon，fromFrankfurtusingOracletools.WhichOraclefilewouldyouenabletoperformthistask？（）

A.Control file
B.Password file
C.Parameter file
D.Online redo log file
E.Listener controller file
F.Server parameter file

多项选择题YouworkasadatabaseadministratorforSupportcenter.cn.Youwanttocreateyourdatabasewiththeautomaticundomanagementfeatureenable.Whichtwotasksmustyouperformtoachievethis？（）

A.Set the UNDO_RETENTION parameter to AUTO.
B.Create an initial undo segment in undotablespace.
C.Set the UNDO_RETENTION parameter to 900 or more
D.Set the initialization parameter UNDO_MANAGEMENT to AUTO
E.Set the UNDO_MANAGEMENT parameter to the name of an undotablespace

单项选择题You work as a database administrator for Supportcenter.cn. Because of space constraints， you decided to manually shrink the table. You executed the ALTER TABLE ....SHRINK SPACE statement to shrink the space and you receive an error as follows：   ERROR at Line 1：   ORA-10635： Invalid segment or tablespace type   What could be the reason？ （）

A.The table is partitioned
B.The table name is wrong.
C.It is an index-Organized table （IOT）
D.The table is stored in locally managedtablespace.
E.The table is stored in atablespacewhere segment space is managed manually.