多选题An RMAN backup job fails， displaying the following error：  ORA/x7f19809： limit exceeded for recovery files  Your analysis shows that the Flash Recovery area is full. Which two actions could you take to resolve the error and avoid this error in future？（

第1题：

Every Sunday， consistent backups are performed on your database. Because of a user error， you performed an incomplete recovery on Tuesday and opened the database with the RESETLOGS option. A user error occurs again on Thursday， which necessitates an incomplete recovery. Sunday’s backup is the most recent backup available. What would you do in this scenario？（）

• A、recovery cannot be performed because a backup was not performed after the last incomplete recovery
• B、restore all the files from Sunday’s backup， and then perform an incomplete recovery up to the point in time when the user error occurred on Thursday
• C、restore all the files from Sunday’s backup， and then recover up to the point in time when the RESETLOGS operation was performed on Tuesday
• D、restore all the files from Sunday’s backup， and open the database to reset the database to the point in time when the backup was performed on Sunday

第2题：

You are using the flash recovery area (fast recovery area in 11g Release 2) to store backup related files in your database. After regular monitoring of space usage in the Mash recovery area. You realize that the flash recovery area is jetting filled up very fast and it is running out of space. Your database flash recovery area is low on space and you have no more room on disk. Proactively, which two options could you use to make more space available in the flash recovery？（）

• A、Change the RMAN archived log deletion policy
• B、Use the RMAN CROSSCHECK command to reclaim the archived log space
• C、Change the RMAN retention policy to retain backups for a shorter period of time
• D、Use OS command to move files from the flash recovery area to some other location

第3题：

You executed the following command to perform a backup of the USERS tablespace：  SQL> ALTER TABLESPACE users BEGIN BACKUP； ALTER TABLESPACE users BEGIN BACKUP *  ERROR at line 1：  ORA-01123： cannot start online backup； media recovery not enabled  What could be the reason for this error（）

• A、The MTTR Advisor is disabled.
• B、The database is in NOARCHIVELOG mode.
• C、The tablespace is already in backup mode.
• D、The Flash Recovery Area is not configured.

第4题：

An RMAN backup job fails， displaying the following error：  ORA/x7f19809： limit exceeded for recovery files  Your analysis shows that the Flash Recovery area is full. Which two actions could you take to resolve the error and avoid this error in future？（）

• A、take the backup of the flash recovery area less frequently
• B、increase the value of the UNDO_RETENTION initialization parameter
• C、change the value of the WORKAREA_SIZE_POLICY initialization parameter to AUTO
• D、change the backup retention policy to retain the backups for a smaller period of time 
• E、increase the value of the DB_RECOVERY_FILE_DEST_SIZE initialization parameter
• F、increase the value of the CONTROL_FILE_RECORD_KEEP_TIME initialization parameter

第5题：

You decided to change the location of the flash recovery area. You executed the following command：   ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’+disk1’ SCOPE=BOTH SID=’*’；   Which statement is true？（）

• A、 The location can be changed only if the flash recovery area is empty.
• B、 After executing the command， all new flash recovery area files will be created in the new location.
• C、 The command will generate an error because you cannot change the flash recovery area while the database is open.
• D、 All the existing files in the flash recovery area will be moved to the new location and all new Flash Recovery Area files will be created in the new location.

第6题：

Your database operates in ARCHIVELOG mode and all the tablespaces are online. Due to a user error， you decided to perform an incomplete recovery. Which two tasks would you be required to perform in the recovery process？（）

• A、 open the database with the RESTRICTED option
• B、 open the database with the RESETLOGS option
• C、 recover to the required SCN only that data file in which the error occurred
• D、 recover all the data files to the same system change number （SCN）

第7题：

You configured the flash recovery area in the database. Which two files would you expect to find in the flash recovery area？（）

• A、 backup pieces
• B、 copies of all the parameter files
• C、 trace file generated using BACKUP CONTROLFILE TO TRACE
• D、 control file autobackups

第8题：

You decided to change the location of the flash recovery area. You executed the following command： Which statement is true？（）

• A、The location can be changed only if the flash recovery area is empty.
• B、After executing the command， all new flash recovery area files will be created in the new location.
• C、The command will generate an error because you cannot change the flash recovery area while the database is open.
• D、All the existing files in the flash recovery area will be moved to the new location， and all new Flash Recovery Area files will be created in the new location.

第9题：

You work as a database administrator for Supportcenter.cn. You received the following error while working on your database： ORA-01555： snapshot too old ，In which situation would you receive such an error？（）

• A、You performed rollback after commit.
• B、If a log switch occurs in your database.
• C、Thearchiverfails to generate an archived log file.
• D、Instance recovery fails to find one of the redo log files.
• E、A long-running query is unable to get read-consistent image.
• F、If you perform manual undo management operations in auto mode.

第10题：

Your database operates in ARCHIVELOG mode and all the tablespaces are online. Due to a user error， you decided to perform an incomplete recovery.  Which two tasks would you be required to perform in the recovery process？ （）

• A、open the database with the RESETLOGS option
• B、open the database with the RESTRICTED option
• C、recover all the data files to the same system change number （SCN）
• D、recover to the required SCN only that data file in which the error occurred