单选题There is a problem with one of the disks used for your database and your system administrator informs you that the disk needs to be replaced. The replacement disk will not be available until tomorrow.  There was only one data file on this disk； it belo

第1题：

Your database is running In ARCIIIVELOG mode. One of the data files， USBRDATAOI. DBF， in the users tablespace is damaged and you need to recover the file until the point of failure. The backup for the data file is available.  Which three files would be used in the user-managed recovery process performed by the database administrator （DBA）？（） 

• A、 redo logs
• B、 control file
• C、 temporary files of temporary tablespace
• D、 the latest backup of only the damaged data file
• E、 the latest backup of all the data files In the USERS tablespace

第2题：

You are using an Automatic Storage Management （ASM） instance to manage the files of your production database. You have two disk groups， DG1 and DG2， with one device each. In the parameter file of the production database， the following parameters have been specified： DB_CREATE_ONLINE_LOG_DEST_1 = ’+dg1’  DB_CREATE_ONLINE_LOG_DEST_2 = ’+dg2’  What would be the impact of this setting？（）

• A、When a new log group is added， it would have one member in each disk group.
• B、When a new log group is added， it would have two members in each disk group.
• C、When a new tablespace is added， it would have one data file in each disk group.
• D、When a new log file is added， it would have one member spread across the disk groups.

第3题：

A data file became corrupted in your database due to bad sectors on the disk. Because of corruption， you lost all the important tables in that data file. Which method would you use for recovery？（）

• A、flash back all the tables in the data file， one by one
• B、restore the data file to a new location and perform a media recovery
• C、flash back the database; there is no need to restore the data file
• D、restore the data file from the most recent backup and flash back the database

第4题：

In which situations will the ASM metadata backup help you recover the ASM disk in a disk group？（）

• A、 when one or more file directory paths are accidentally deleted from an ASM disk group
• B、 when one of the disks in a disk group is accidentaly unplugged
• C、 when the data file on an ASM disk group gets corrupted
• D、 when one or more disks in an ASM disk group are lost

第5题：

A data file become corrupted in your database due to bad sectors on the disk. Because of corruption， you lost all the important tables in that data file. Which method would you use for recovery？（）

• A、 Flash back all the tables in the data file， one by one.
• B、 Restore the data file to a new location and perform a media recovery.
• C、 Flash back the database， there is no need to restore the data file.
• D、 Restore the data file from the most recent backup and flash the database.

第6题：

You are managing an Oracle Database 11g ASM instance with a disk group dg01 having three disks. One of the disks in the disk group becomes unavailable because of power failure. You issued the following command to change the DISK_REPAIR_TIME attribute from 3.6 hours to 5 hours: ALTER DISKGROUP dg01 SET ATTRIBUTE 'disk_repair_time' = '5h'; To which disks in the disk group will the new value be applicable?（）

• A、all disks in the disk group
• B、all disks that are currently in OFFLINE mode
• C、all disks that are not currently in OFFLINE mode
• D、all disks in the disk group only if all of them are ONLINE

第7题：

You work as a database administrator for Certkiller .com. Your database is in NOARCHIVELOG mode. The database has been configured with three redo logs groups， and there have been five log switches. You lost one non-system-critical data file from your database.  Which method would you use to recover the data file？（）

• A、Restore all the data files and open the database
• B、Create the data file and performtablespacerecovery
• C、No need to restore any file， just recover the database
• D、Restore only the system data file and recover the database
• E、Restore only lost date file and performtablespacerecovery

第8题：

Your database is running in ARCHIVELOG mode. One of the data files,USERDATA01.dbf, in the USERS tablespace is damaged and you need to recover the file until the point of failure. The backup for the datafile is available. Which three files would be used in the user-managed recovery process performed by the database administrator (DBA)?（）

• A、Redo logs
• B、Control file
• C、The latest backup of only the damaged data file
• D、The latest backup of all the data file in the USERS tablespace
• E、Temporary files of temporary tablespace
• F、Archive Logs since the latest backup to point of failure

第9题：

You are an Oracle DBA responsible for an ASM instance. The disk controller on your system fails. You suspect that the disk itself is okay. You know it will take 24 hours to replace the controller and you don’t want to have to rebuild the disks from scratch.  What do you do？（）  

• A、 Take the whole disk group offline and wait for the controller card to be installed. Once it’s installed，bring the disk group online again.
• B、 Change the ASM parameter ASM_PREFERRED_READ_FAILURE_GROUPS to indicate that you want to read from the non-failed disk. Once the disk controller is replaced，reset the parameter to  its original value.
• C、 You have no choice but to rebuild the disk. Drop the disk from the disk group and wait for the controller to be replaced. Once the controller is replaced， add the disk back into the disk group and allow ASM to rebuild it.
• D、 If you are using any setting other than REDUNDANCY EXTERNAL for your disk group，you will have to recover any data on that disk from a backup. The database will be unavailable until you can  correct the problem and perform recovery.
• E、 Change the attribute DISK_REPAIR_TIME on the disk group to a time greater than 24 hours.

第10题：

There is a problem with one of the disks used for your database and your system administrator informs you that the disk needs to be replaced. The replacement disk will not be available until tomorrow.  There was only one data file on this disk； it belongs to the USERS tablespace in your PROD database. Your PROD database runs in ARCHIVELOG mode and nightly online backups are taken. The users need to be able to access the data in the USERS tablespace before the replacement disk arrives. You have already taken the USERS tablespace offline and have restored the data file from last night’s backup to a new disk. Which additional steps are required in order to make the USERS tablespace available？（）

• A、Only bring the tablespace back online.
• B、Only recover the tablespace and then bring the tablespace back online.
• C、Shut down the database， recover the data file and then start up the database.
• D、Issue the ALTER DATABASE RENAME FILE command， recover the tablespace， and then bring the tablespace online.
• E、Recover the tablespace， issue the ALTER DATABASE RENAME FILE command， and then bring the tablespace online.