Compressed backups work with which of the following commands？（）

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.

A . The BZIP2 compression algorithm consumes more CPU resources than the ZLIB compression algorithm. B . The ZLIB compression algorithm consumes more CPU resources than the BZIP2 compression algorithm. C . The ZLIB compression algorithm provides maximum compression and produces smaller backups than the BZIP2 compression algorithm. D . Only the BZIP2 compression algorithm can be used to make compressed backups to disk.

A .  BACKUP AS COMPRESSED BACKUPSET DATABASE B .  BACKUP AS COMPRESSED COPY OF DATABASE C .  CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COMPRESSED BACKUPSET D .  CONFIGURE DEVICE TYPE DISK BACKUP TYPE COMPRESS  E .  BACKUP DATABASE COMPRESS

A .  The BZIP2 compression algorithm consumes more CPU resources than the ZLIB compression algorithm. B .  The ZLIB compression algorithm consumes more CPU resources than the BZIP2 compression algorithm. C .  The ZLIB compression algorithm provides maximum compression and produces smaller backups than the BZIP2 compression algorithm. D .  Only the BZIP2 compression algorithm can be used to make compressed backups to disk.

A . the air receivers B . the starting valves C . the cylinder covers D . the distributor

A . compressors B . forced fans C . ventilators D . generator

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 proce

A .  Backup compression is disabled by default. B .  Backup compression can be used with both backup sets and image copies. C .  Backup compression cannot be enabled using the CONFIGURE command. D .  Backup compression works only if the COMPATIBILITY parameter is set to 9.0.0.0 or higher. E .  Backup compression applies to only backup sets. F .  Backup compression applies to only image copies.

A .  2 minutes B .  2 hours C .  2 days D .  The command will generate an error. E .  This backup is not constrained by any time limitation.

A . maximum working temperature B . minimum working temperature C . the joint D . the insulating material

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&e

A . You are backing up to tape and your tape device performs its own compression. B . You are making image copies, and you have not enabled tablespace compression. C . You are using disk-based backups and disk space in your Flash Recovery Area, or other disk-based backup destinations are limited. D . You are performing your backups to some device over a network where reduced network bandwidth is more important than CPU usage. E . You are using some archival backup media, such as CD or DVD, where reducing backup sizes saves media costs and archival storage.

A . A backup of the target database when it is mounted B . A backup of online redo log files when the database is open C . A backup of only used data blocks in the file beingbeingbackup up D . A backup of online， read/write data files when the database is open E . A backup of only those data blocks that have changed since a previous backup F . A backup of online， read/write data files when the database is in the NOMOUNT state.

A . Hot backup B . Online backup C . consistent backup D . incremental backup E . inconsistent backu

A . The DBMS_JOB package B . The BACKUP_JOB package C . The DBMS_BACKUP_RESTORE package D . The calendar tool in the Operating System （OS） E . The backup scheduler in Enterprise Manager （EM） F . The DBMS_BACKUP_SCHEDULER packager inline mode

A . RTP B . RTSP C . HTTP D . TCP E . UDP

A . You can perform consistent backups only. B . You can perform a complete database backup without shutting down the database instance. C . You can back up data files only when all data files have the same SCN recorded in the control file. D . You can back up only those data files whose headers are frozen by using ALTER TABLESPACE BEGINBACKUP or ALTER DATABASE BEGIN BACKUP command

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.

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 1 backup. C . The backup performed on each working day contains all the blocks that have changed since the last level 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 backu

A .  The entire backup will fail.It will not be usable for recovery. B .  The entire backup will failbut any datafile successfully backed up will be usable for recovery. C .  If this backup fails，subsequent backups will prioritize datafiles not backed up. D .  If this backup fails，an error will be raised and any other commands will not be executed.  E .  If this backup fails，no error will be raised and any other commands will be executed.

A . Hot backup B . Online backup C . consistent backup D . incremental backup E . inconsistent backu

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 proce

A . You can perform consistent backups only. B . You can perform a complete database backup without shutting down the database instance. C . You can back up data files only when all data files have the same SCN recorded in the control file. D . You can back up only those data files whose headers are frozen by using ALTER TABLESPACE BEGINBACKUP or ALTER DATABASE BEGIN BACKUP commands.

：A.价格利润空间很窄，但是考虑到我们之间的长期合作关系，我方接受贵方报价。 B.但是考虑到我们之间的长期合作关系以及你们团队为保证产品质量所做的努力，我方接受贵方报价。 C.价格利润空间很窄，但是考虑到我们之间的长期合作关系以及你们团队为保证产品质量所做的努力，我方接受贵方报价。 D.价格利润空间很窄，但是考虑到你们团队为保证产品质量所做的努力，我方接受贵方报价。