單項選擇題

You work as a database administrator for Supportcenter.cn. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it？（）

A.Uses undo data for roll forward
B.Uses Flashback Log for recovery
C.Uses online redo logs to roll back
D.Uses undo data to roll back the transaction
E.Uses Recovery Manager （RMAN） to roll back
F.Uses the System Monitor （SMON） background process to perform instance recovery

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多項選擇題

You work as a database administrator for Supportcenter.cn. Your listener process， L1， is currently listening to three databases： CertK INDB04， SupportCenter DB05 and SupportCenter DB06. Using Database Configuration Assistant （DBCA） you create one more database， SupportCenter DB07， and enable dynamic registration. Which two commands of Listener Control Utility （lsnrct1） would you use to determine whether the dynamic registration occurred for the database， SupportCenter DB07， with the L1 listener process？（）

A.SHOW L1
B.SPAWN L1
C.STATUS L1
D.SERVICES L1
E.STATUS LISTENER
F.SERVICES LISTENER
G.SHOWcurrent_listener

單項選擇題

You work as a database administrator for Supportcenter.cn. You are using Recovery Manager （RMAN） for backup and recovery of your database. You executed the delete command in RMAN to delete a backup of a tablespace. Which statement is true in this scenario？（）

A.The backup status will be marked expired in RMAN recovery catalog.
B.The backup status will be marked deleted in RMAN recovery catalog after you execute the crosscheck command.
C.The backup will be deleted physically from the OS （Operating system）and the backup information is removed from the recovery catalogl
D.The backup status will be marked deleted and you must delete the backup file manually from the OS （Operating system）.
E.The backup status will be marked deleted and you must delete the backup file manually from the OS （Operating system）， if you are not using Oracle Managed Files （OMF）.

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You work as a database administrator for Supportcenter.cn. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it？（）

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You work as a database administrator for Supportcenter.cn. You are using Recovery Manager （RMAN） for backup and recovery of your database. You executed the delete command in RMAN to delete a backup of a tablespace. Which statement is true in this scenario？（）

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You work as a database administrator for Supportcenter.cn. You are using Recovery Manager （RMAN） for backup and recovery of your database. You executed the delete command in RMAN to delete a backup of a tablespace. Which statement is true in this scenario？（）