When a database administrator chooses the dimensions for an MDC table, which two characteristics should beconsidered?（）A、the query transaction rate B、numeric data versus character data C、extent size D、the cardinality of the candidate columns E、prefetch size
When a database administrator chooses the dimensions for an MDC table, which two characteristics should beconsidered?（）
- A、the query transaction rate
- B、numeric data versus character data
- C、extent size
- D、the cardinality of the candidate columns
- E、prefetch size
相关考题：
Oracle Grid Infrastructure for a stand-alone server is installed on your production host before installing the Oracle Database server. The database and listener are configured by using Oracle Restart.Examine the following command and its output:$ crsctl config has CRS-4622: Oracle High Availability Services auto start is enabled.What does this imply?（）A. When you start an instance on a high with SQL *Plus dependent listeners and ASM disk groups are automatically started.B. When a database instance is started by using the SRVCTL utility and listener startup fails, the instance is still started.C. When a database is created by using SQL* Plus, it is automatically added to the Oracle Restart configuration.D. When you create a database service by modifying the SERVICE_NAMES initialization parameter, it is automatically added to the Oracle Restart configuration.
What Oracle process runs when the database is in ARCHIVELOG mode but not when it is in NOARCHIVELOG mode？（）A、 MMONB、 LGWRC、 ARCHD、 ARWRE、 COPY
You work as a database administrator for Supportcenter.cn. You are using Recovery Manager （RMAN） to perform backups in your databases. Which four backup operations can be performed using RMAN？（）A、A backup of the target database when it is mountedB、A backup of online redo log files when the database is openC、A backup of only used data blocks in the file beingbeingbackup upD、A backup of online， read/write data files when the database is openE、A backup of only those data blocks that have changed since a previous backupF、A backup of online， read/write data files when the database is in the NOMOUNT state.
RMAN enables you to open the target database when it is already mounted. Which command must you execute at the RMAN prompt to open the database？（）A、’SQL ALTER DATABASE OPEN’；B、SQL ALTER DATABASE ’OPEN’；C、OPEN DATABASE；D、DATABASE OPEN
What type of protection is implemented when the DBA issues the ALTER DATABASE SET STANDBY DATABASE PROTECTED； command？（）A、The standby database is protected against write operations. B、The primary database is protected against write operations. C、The primary database is protected against data loss and data divergence. D、The standby database is protected against data loss and data divergence.
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You executed the following query in your database： SELECT oldest_flashback_scn， oldest_flashback_time FROM V$FLASHBACK_DATABASE_LOG； What would you determine from the output？（）A、 The time when the last flashback operation in your database was performed.B、 The time when the first flashback operation in your database was performed.C、 A list of flashback operations performed in your database using SCN and time.D、 The approximate time and the lowest system change number （SCN） to which you can flash back your database.
you can perform an active database duplication when the database is in NOARCHIVELOG mode.（）A、 TrueB、 False
In which situation would you use static database registration for a listener（）A、when multiple databases are to be registered with the listenerB、when DBAs need to connect remotely to start up the database instanceC、when users need to connect the database instance using the host naming methodD、when the database instance that is to be registered with the listener is configured in shared server mode
When issuing the duplicate database command， you use the parameter DB_FILE_NAME_CONVERT. For what purpose do you use this parameter？（） A、 To indicate the location of the auxiliary-instance online redo logs.B、 To indicate the location of the target database datafiles.C、 To indicate the location of the auxiliary-instance control file and online redo logs.D、 To indicate the location of the auxiliary-instance database datafiles.E、 This is not a valid parameter when duplicating a database.
You executed the following query in your database： FROM V$FLASHBACK_DATABASE_LOG; What would you determine from the output？（）A、the time when the last flashback operation in your database was performedB、the time when the first flashback operation in your database was performedC、a list of flashback operations performed in your database using SCN and timeD、the approximate time and the lowest system change number （SCN） to which you can flash back your database
In which of the following scenarios is a tablespace recovery required？（）A、 when recovering a lost read-only tablespace from a read-only tablespace backupB、 when recovering a lost read-only tablespace from a read-write tablespace backup when the database is running in ARCHIVELOG modeC、 when recovering a lost read-only tablespace from a read-write tablespace backup when the database is running in NOARCHIVELOG mode and the changes in the online redo log files have been overwrittenD、 when recovering a lost read-only tablespace from a read-only tablespace backup using the backup of the control file， the control file was created using the ALTER DATABASE BACKUP CONTROLFILE TO TRACE statement， and this statement was issued when the tablespace was read-only
You are managing the Oracle database. Which of the following choices correctly identifies when Oracle reads the contents of the init.ora file?（）A、When the instance is started B、When the database is mounted C、When the database is opened D、When the database is closed
In which scenario is a Database Administrator NOT required to perform an incomplete recovery？（）A、 when all the online redo log groups are multiplexed and one of the members of a group is missingB、 when all the online redo log groups are not multiplexed and one log group is missingC、 when all the control files are missingD、 when some important tables are deleted from the database and purged from the Recycle Bin
You are a database administrator for your company. The company uses a vendor company’s application that is based on a proprietary database. You query data from the application database and import the data into a SQL Server 2005 database. The application vendor provides you with a new OLE DB driver to be used when querying the application database. Company policy prohibits connections between the SQL Server database and the application database， except when querying this data. You need to provide a way to query data from the application database. What should you？（）A、Configure a Linked Server connection to the application database.B、Write a query that uses an OPENDATASOURCE command.C、Write a query that uses an OPENQUERY command.D、Configure a Remote Server connection to the application database.
单选题When issuing the duplicate database command， you use the parameter DB_FILE_NAME_CONVERT. For what purpose do you use this parameter？（）A To indicate the location of the auxiliary-instance online redo logs.B To indicate the location of the target database datafiles.C To indicate the location of the auxiliary-instance control file and online redo logs.D To indicate the location of the auxiliary-instance database datafiles.E This is not a valid parameter when duplicating a database.
单选题Your database is running in ARCHIVELOG mode. You are performing a user-managed backup of the DATA1 tablespace. You place the DATA1 tablespace in backup mode by issuing the following statement： ALTER TABLESPACE data1 BEGIN BACKUP； While you are performing the backup， an error occurs that causes the instance to terminate abnormally. Which statement about the DATA1 tablespace is true？（）A The DATA1 tablespace is automatically taken out of backup mode when the instance aborts.B If you restart the database，the DATA1 tablespace will be automatically taken out of backup mode when the database is opened.C If you restart the database，the DATA1 tablespace will be automatically taken out of backup mode when the database is mounted.D If you restart the database，the database will not be opened.
单选题Your database is running in ARCHIVELOG mode. You are performing a user-managed backup of the DATA1 tablespace. You place the DATA1 tablespace in backup mode by issuing the following statement: ALTER TABLESPACE data1 BEGIN BACKUP; While you are performing the backup, an error occurs that causes the instance to terminate abnormally. Which statement about the DATA1 tablespace is true?（）AThe DATA1 tablespace is automatically taken out of backup mode when the instance aborts.BIf you restart the database, the DATA1 tablespace will be automatically taken out of backup mode when the database is opened.CIf you restart the database, the DATA1 tablespace will be automatically taken out of backup mode when the database is mounted.DIf you restart the database, the database will not be opened.
单选题In which scenario is a Database Administrator NOT required to perform an incomplete recovery？（）A when all the online redo log groups are multiplexed and one of the members of a group is missingB when all the online redo log groups are not multiplexed and one log group is missingC when all the control files are missingD when some important tables are deleted from the database and purged from the Recycle Bin
单选题You executed the following query in your database： SELECT oldest_flashback_scn， oldest_flashback_time FROM V$FLASHBACK_DATABASE_LOG； What would you determine from the output？（）A The time when the last flashback operation in your database was performed.B The time when the first flashback operation in your database was performed.C A list of flashback operations performed in your database using SCN and time.D The approximate time and the lowest system change number （SCN） to which you can flash back your database.
单选题you can perform an active database duplication when the database is in NOARCHIVELOG mode.（）A TrueB False
多选题You work as a database administrator for Certkiller .com. You are using Recovery Manager （RMAN） to perform backups in your databases. Which four backup operations can be performed using RMAN？（）AA backup of the target database when it is mountedBA backup of online redo log files when the database is openCA backup of only used data blocks in the file beingbeingbackup upDA backup of online， read/write data files when the database is openEA backup of only those data blocks that have changed since a previous backupFA backup of online， read/write data files when the database is in the NOMOUNT state.
单选题You are managing the Oracle database. Which of the following choices correctly identifies when Oracle reads the contents of the init.ora file?（）AWhen the instance is started BWhen the database is mounted CWhen the database is opened DWhen the database is closed
单选题When performing recover of a database in NOARCHIVELOG mode with RMAN， the target database must be in the （） state to restore the control file.AOPENBIDLECMOUNTDNOMOUNT
单选题Which of the following commands cannot be executed when the database open？（）ARECOVER DATABASEBRECOVER TABLESPACECRECOVER DATAFILEDALTER DATABASE RECOVER DATAFILE
单选题What Oracle process runs when the database is in ARCHIVELOG mode but not when it is in NOARCHIVELOG mode？（）A MMONB LGWRC ARCHD ARWRE COPY
单选题You executed the following query in your database： FROM V$FLASHBACK_DATABASE_LOG; What would you determine from the output？（）Athe time when the last flashback operation in your database was performedBthe time when the first flashback operation in your database was performedCa list of flashback operations performed in your database using SCN and timeDthe approximate time and the lowest system change number （SCN） to which you can flash back your database
单选题RMAN enables you to open the target database when it is already mounted. Which command must you execute at the RMAN prompt to open the database？（）A’SQL ALTER DATABASE OPEN’；BSQL ALTER DATABASE ’OPEN’；COPEN DATABASE；DDATABASE OPEN