多选题You want to take a complete database backup using RMAN. The backup should consist onlythe used blocks from your database. Which two statements are true about this backup operation？（）ABackup compression should be enabledBParallelism for the channel shou

第1题：

第2题：

You want to take the backup of the USERS tablespace. It has a single data file of 900 MB. You have tape drives of 300 MB each. The SBT channel is configured for Recovery Manager (RMAN). To accomplish the backup, you issued the following RMAN command: RMAN> BACKUP SECTION SIZE 300M TABLESPACE users; Which two statements are true about the execution of the above command? （）(Choose two.)

• A、The backup piece size will be limited to 300 MB
• B、The RMAN uses multiplexing to perform backup
• C、The operation is accomplished using the default channel available
• D、The RMAN parallelizes the backup although the parallelism is not set for a channel

第3题：

You perform differential incremental level 1 backups of your database on each working day and level 0 backup on Sundays， to tape.  Which two statements are true about differential incremental backups（）

• A、The backup performed on Sundays contains all the blocks that have ever been used in the database.
• B、The backup performed on Sundays contains all the blocks that have changed since the last level 1backup. 
• C、The backup performed on each working day contains all the blocks that have changed since the lastlevel 0 backup.
• D、The backup performed on Monday contains all the blocks that have changed since the level 0 backup，and every other working day contains all the blocks that have changed since the level 1 backup.

第4题：

You want to take the backup of the USERS tablespace. It has a single data file of 900 MB. You have tape drives of 300 MB each. The SBT channel is configured for the RMAN. To accomplish the backup， you issued the following RMAN command：   RMAN> BACKUP SECTION SIZE 300M TABLESPACE users；   Which two statements are true regarding the execution of the above command？（）

• A、 The RMAN parallelizes the backup although the parallelism is not set for a channel.
• B、 The backup piece size will be limited to 300 MB.
• C、 The operation is accomplished using the default channel available.
• D、 Three channels for the tape drive must be configured by setting the parallelism to three.

第5题：

You want to take a complete database backup using RMAN. The backup should consist only the used blocks from your database.Which two statements are true about this backup operation?（）

• A、Backup compression should be enabled
• B、Parallelism for the channel should be set to 2
• C、All the files must be backed up as backup sets
• D、The backup may be stored either on disk or on media with media manager

第6题：

You work as a database administrator for Certkiller .com. According to your backup strategy， you performed an incremental level 0 backup of your database. Which statement regarding this backup is true？（）

• A、The backup is similar to image copy.
• B、The backup contains all used data blocks.
• C、The backup contains only unused data blocks.
• D、The backup contains all data blocks changed since the last incremental level 1 backup.

第7题：

第8题：

第9题：

第10题：

第11题：

第12题：

第13题：

You want to take a complete database backup using RMAN. The backup should consist onlythe used blocks from your database. Which two statements are true about this backup operation？（） 

• A、 Backup compression should be enabled
• B、 Parallelism for the channel should be set to 2
• C、 All the files must be backed up as backup sets
• D、 The backup may be stored either on disk or on media with media manager

第14题：

You are working on an Oracle Database 10g database. Because of data loss， you decided to perform a Flashback Database operation using the following command：  SQL> FLASHBACK DATABASE TO TIMESTAMP（SYSDATE 5/24）;  Which two statements are true？ （）

• A、SYSDATE should not be used with TIMESTAMP.
• B、The database must have multiplexed redo log files.
• C、The database must be in the MOUNT state to execute the command.
• D、The database must be opened with the RESETLOGS option after the flashback operation.
• E、The entire database needs to be restored from the most recent backup before the flashback operation.

第15题：

You want to perform an RMAN backup of database as a copy. Which two factors will you consider while performing the backup operation？（）

• A、 The backup as copy can only be taken to disk
• B、 The backup as copy can only be taken to tape
• C、 Backup can be performed only when the instance is shutdown
• D、 Backup will constitute all used and unused blocks in the database

第16题：

You want to take a complete database backup using RMAN. The backup should consist only the used blocks from your database. Which two statements are true about this backup operation? （）(Choose two.)

• A、Backup compression should be enabled
• B、Parallelism for the channel should be set to 2
• C、All the files must be backed up as backup sets
• D、The backup may be stored either on disk or on media with media manager

第17题：

You want to perform an RMAN backup of database as a copy. Which two factors will you consider whileperforming the backup operation?（） (Choose two).

• A、The backup as copy can only be taken to disk
• B、The backup as copy can only be taken to tape
• C、Backup can be performed only when the instance is shutdown
• D、Backup will constitute all used and unused blocks in the database

第18题：

According to your backup strategy， you performed an incremental level 0 backup of your database. Which statement regarding this backup is true？（）

• A、The backup is similar to image copy.
• B、The backup contains all used data blocks.
• C、The backup contains only unused data blocks.
• D、The backup contains all data blocks changed since the last incremental level 1 backup.

第19题：

第20题：

第21题：

第22题：

第23题：

第24题：