多选题You are using Recovery Manager (RMAN) to perform backups. In which three situations would you perform a compressed backup?（）AYou are backing up to tape and your tape device performs its own compression.BYou are making image copies, and you have not ena

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多选题

You are using Recovery Manager (RMAN) to perform backups. In which three situations would you perform a compressed backup?（）

You are backing up to tape and your tape device performs its own compression.

You are making image copies, and you have not enabled tablespace compression.

You are using disk-based backups and disk space in your Flash Recovery Area, or other disk-based backup destinations are limited.

You are performing your backups to some device over a network where reduced network bandwidth is more important than CPU usage.

You are using some archival backup media, such as CD or DVD, where reducing backup sizes saves media costs and archival storage.

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相似问题和答案

第1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

参考答案：A, C

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

正确答案:A,C

第3题：

You are tuning RMAN to optimize performance.You want tape I／O to be asynchronous when you perform tape backups. Which action should you take?()

A. Set the BACKUP_TAPE_IO_SLAVES parameter to FALSE

B.Set the BACKUP_TAPE_IO_SLAVES parameter to TRUE

C. Use compression when performing tape backups

D. Configure multiple SBT channels

参考答案：B

第4题：

You perform a backup using the following BACKUP command: RMAN> BACKUP AS COMPRESSED BACKUPSET DATABASE,Which statement is true of this command?（）

A、A different procedure is required to restore a database from compressed backups
B、The AS COMPRESSED clause of the BACKUP command provided by RMAN is used to create compressed backup sets and image copies.
C、Using this command to create backups minimizes the bandwidth consumed.
D、Using this command to create backups improves the performance of the backup process

正确答案:C

第5题：

Your database is functioning in NOARCHIVELOG mode. Your database contains 15 tablespaces. You want to use Recovery Manager （RMAN） to perform backups. Which two backups would you be able to perform when the database is being accessed by users？（）

A、 Backup of offline tablespaces.
B、 Backup of read-only tablespaces.
C、 Backup of system-critical tablespaces.
D、 Backup of online， locally managed tablespaces.
E、 Backup of read/write dictionary-managed tablespaces.

正确答案:A,B

第6题：

You issued the following commands to configure setting in RMAN;RMAN> CONFIGURE DEVICE TYPE sbt PARALLELISM 1;RMAN> CONFIGURE DEFAULT DEVICE TYPE TO sbt;RMAN> CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE sbt TO 2;RMAN> CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE sbt TO 2;RMAN> CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2;Then you issued the following command to take the backup:RMAN> BACKUP DATABASE PLUS ARCHIVELOG;Which statement is true about the execution of the above command?（）

A. The backup will terminate because the FORMAT clause was not configured for the channel

B. It backs up two copies of data files to tape and disk, and two copies of archived log file on tape

C. It backs up the data files and archived log files to disk, making two copies of each data file and archived log file

D. It backs up the data files and archived log files to tape, making two copies of each data file and archived log file

参考答案：D

第7题：

You are tuning RMAN to optimize performance. You want tape I/O to be asynchronous when you perform tape backups. Which action should you take？（）

A、 Set the BACKUP_TAPE_IO_SLAVES parameter to FALSE
B、 Set the BACKUP_TAPE_IO_SLAVES parameter to TRUE
C、 Use compression when performing tape backups
D、 Configure multiple SBT channels

正确答案:B

第8题：

You want to back up your 100-GB database on a remote tape device. You are required to ensure that minimum network bandwidth is consumed while transferring the backups to the tape device. The current consumption of your CPU is approximately 40 percent.Which type of backup should you perform?（）

A. standard backup set

B. image copy

C. compressed backup

D. user-managed backup

参考答案：C

第9题：

A、backup of offline tablespaces
B、backup of readonly tablespaces
C、backup of systemcritical tablespaces
D、backup of online， locally managed tablespaces
E、backup of read/write dictionarymanaged tablespaces

正确答案:A,B

第10题：

In your database， all the tablespaces are locally managed. You started Recovery Manager （RMAN） using recovery catalog and restored the control file by using the following command： RMAN> RESTORE CONTROLFILE; Which two operations do you need to perform after restoring the control file from backup？（）

A、shut down and restart the instance
B、add new tempfiles to the temporary tablespaces after recovery
C、perform a media recovery and open the database with the RESETLOGS option
D、perform a media recovery and bring the database to NOARCHIVELOG mode

正确答案:B,C

多选题You are using Recovery Manager (RMAN) to perform backups. In which three situations would you perform a compressed backup?（）AYou are backing up to tape and your tape device performs its own compression.BYou are making image copies, and you have not ena

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