单选题Your database is in NOARCHIVELOG mode and a logswitch happens every 20 minutes. On Thursday morning, media failure resulted in corruption of a data file belonging to the TOOLS tablespace. Backups are taken on every Sunday.What would you do in this situation?()Arecover using Oracle Flashback Database technologyBrestore the data files from backup and perform a complete recoveryCrestore only the corrupted data file and perform tablespace recoveryDrestore the data files from backup and perform cancel­based recoveryErestore the entire database from the most recent backup and start the instance and open the database

单选题
Your database is in NOARCHIVELOG mode and a logswitch happens every 20 minutes. On Thursday morning, media failure resulted in corruption of a data file belonging to the TOOLS tablespace. Backups are taken on every Sunday.What would you do in this situation?()
A

recover using Oracle Flashback Database technology

B

restore the data files from backup and perform a complete recovery

C

restore only the corrupted data file and perform tablespace recovery

D

restore the data files from backup and perform cancel­based recovery

E

restore the entire database from the most recent backup and start the instance and open the database


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Your database is in NOARCHIVELOG mode and a logswitch happens every 20 minutes. On Thursday morning, media failure resulted in corruption of a data file belonging to the TOOLS tablespace. Backups are taken on every Sunday.What would you do in this situation?()A、recover using Oracle Flashback Database technologyB、restore the data files from backup and perform a complete recoveryC、restore only the corrupted data file and perform tablespace recoveryD、restore the data files from backup and perform cancel­based recoveryE、restore the entire database from the most recent backup and start the instance and open the database

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You are managing an Oracle Database 11g database. The database is open, and you plan to  performRecovery Manager (RMAN) backups.  Which three statements are true about these backups()A、The backups would be consistent. B、The backups would be inconsistent.C、The backups would be possible only if the database is running in ARCHIVELOG mode.D、The backups would be possible only if the database is running in NOARCHIVELOG mode.E、The backups need to be restored and the database has to be recovered in case of a media failure.

单选题You work as a database administrator at Certkiller .com. Your database is open and running in ARCHIVELOGmode. You take RMANfull backups every Sunday night. On Monday morning, while querying the user1.employeestable, you receive the following error message:  01578: ORACLE data block corrupted (file # 5, block # 51)  ORA-01110: data file 5:’/u01/app/oracle/oradata/orcl/example01.dbf’  You need to rectify the corruption while ensuring the following:  The data file should remain online.  The mean time to recover (MTTR) should be minimal.  You are not using a backup control file and all the archived logs are accessible.  Which option would you choose?()A flash back the corrupted blocksB use the DBMS_REPAIR packageC use the RMAN TSPITR commandD use the RMAN BLOCKRECOVER commandE use the RESTORE DATABASE and RECOVER DATABASE commandsF investigate the time at which the corruption occurred and perform a point-in-time recovery

单选题Your database is open and running in ARCHIVELOG mode. You take RMAN full backups every Sunday night. On Monday morning, while querying the user1.employees table, you receive the following error message:  01578: ORACLE data block corrupted (file # 5, block # 51) ORA/x7f01110: data file 5: ’/u01/app/oracle/oradata/orcl/example01.dbf’  You need to rectify the corruption while ensuring the following: The data file should remain online.  The mean time to recover (MTTR) should be minimal.  You are not using a backup control file, and all the archived logs are accessible. Which option would you choose?()Aflash back the corrupted blocksBuse the DBMS_REPAIR packageCuse the RMAN TSPITR commandDuse the RMAN BLOCKRECOVER commandEuse the RESTORE DATABASE and RECOVER DATABASE commandsFinvestigate the time at which the corruption occurred and perform a point­in­time recovery

单选题You are operating your database in NOARCHIVELOG mode. Your most recent backup includes a copy of all of the data files and the control files taken when the current log sequence number was 45. You experience disk failure on the drive on which your SYSTEM tablespace data files are stored. At the time of the failure, the current log sequence number is 98. Which files should you restore to recover from the loss of the SYSTEM tablespace data files?()AOnly the data files.BAll of the data files and the control files.COnly the data files belonging to the SYSTEM tablespace.DOnly the data files belonging to the SYSTEM tablespace and the control files.

多选题You are managing an Oracle Database 11g database. The database is open, and you plan to  performRecovery Manager (RMAN) backups.  Which three statements are true about these backups()AThe backups would be consistent.BThe backups would be inconsistent.CThe backups would be possible only if the database is running in ARCHIVELOG mode.DThe backups would be possible only if the database is running in NOARCHIVELOG mode.EThe backups need to be restored and the database has to be recovered in case of a media failure.

单选题You work as a database administrator for Supportcenter.cn. 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?()ARestore all the data files and open the databaseBCreate the data file and perform tablespace recoveryCNo need to restore any file, just recover the databaseDRestore only the system data file and recover the databaseERestore only lost date file and performtablespacerecovery

单选题Your test database is configured to run in NOARCHIVELOG mode. One of the data files in the USERStablespace is lost due to a media failure. You notice that all the online redo logs have been overwritten since the last backup.  What would you do to recover the data file()ATake the USERS tablespace offline and re-create the lost data file.BShut down the instance, restore the data file from the last consistent backup, and restart the databaseinstance.CShut down the instance, restore all the database files from the last consistent backup, and restart thedatabase instance.DTake the USERS tablespace offline, restore all the data files of the USERS tablespace from the lastconsistent backup, and make the tablespace online.

单选题Your test database is configured to run in NOARCHIVELOG mode. One of the data files in the USERS tablespace is lost due to a media failure. You notice that all the online redo logs have been overwritten sincethe last backup.  What would you do to recover the data file()ATake the USERS tablespace offline and re-create the lost data file.BShut down the instance, restore the data file from the last consistent backup, and restart the databaseinstance.CShut down the instance, restore all the database files from the last consistent backup, and restart thedatabase instance.DTake the USERS tablespace offline, restore all the data files of the USERS tablespace from the lastconsistent backup, and make the tablespace online

单选题Your database operates in ARCHIVELOG mode and user/x7fmanaged consistent backups are performed every Sunday night. On Tuesday, at 9:00 a.m. the current log sequence number was 369. Also, on Tuesday you lost the data file belonging to the SYSTEM tablespace and an archivelog file (sequence number 356) that contained redo entries between 8:00 a.m. and 8:30 a.m. With reference to this scenario, what would you do to recover the database?()Arestore all the data files from last Sunday’s backup, and then perform a time­based recoveryBrestore all the data files from last Sunday’s backup, and then perform a cancel­based recoveryCrestore all the data files from last Sunday’s backup, and then perform a change­based recoveryDrestore only data files that belong to the SYSTEM tablespace from last Sunday’s backup, and then perform a complete recovery

单选题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?()Aflash back all the tables in the data file, one by oneBrestore the data file to a new location and perform a media recoveryCflash back the database; there is no need to restore the data fileDrestore the data file from the most recent backup and flash back the database

单选题You have only two redo log groups and these groups get overwritten several times in a day. Your database operates in NOARCHIVELOG mode and user-managed consistent backups are performed every Sunday night. On Thursday morning, you find that an important table has been dropped and purged. With reference to this scenario, up to what point in time can the data be recovered?()A until Thursday morningB until that point in time when the database is openedC until that point in time when the recovery is performedD until last Sunday’s backupE until that point in time when the table is dropped and purgedF until Wednesday evening

单选题You have only two redo log groups and these groups get overwritten several times in a day. Your database operates in NOARCHIVELOG mode and user/x7fmanaged consistent backups are performed every Sunday night. On Thursday morning, you find that an important table has been dropped and purged.  With reference to this scenario, up to what point in time can the data be recovered?()Auntil Thursday morningBuntil last Sunday’s backupCuntil Wednesday eveningDuntil that point in time when the database is openedEuntil that point in time when the recovery is performedFuntil that point in time when the table is dropped and purged

单选题Your database is in NOARCHIVELOG mode and a logswitch happens every 20 minutes. On Thursday morning, media failure resulted in corruption of a data file belonging to the TOOLS tablespace. Backups are taken on every Sunday. What would you do in this situation?()Arecover using Oracle Flashback Database technologyBrestore the data files from backup and perform a complete recoveryCrestore only the corrupted data file and perform tablespace recoveryDrestore the data files from backup and perform cancel-based recoveryErestore the entire database from the most recent backup and start the instance and open the database

多选题You are performing a block media recovery on the tools01.dbf data file in the SALES database by using RMAN.   Which two statements are correct in this scenario?()AYou must ensure that the SALES database is mounted or open.BYou must restore a backup control file to perform a block media recovery.CYou must take the tools01.dbf data file offline before you start a block media recovery.DYou must put the database in NOARCHIVELOG mode to perform a block media recovery.EYou can perform only a complete media recovery of individual blocks; point-in-time recovery of  individual data blocks is not supported.