You work as a database administrator for Supportcenter.cn. Your database is configured for automatic undo management. UNDO_RETENTION is set to 3 hours. You want to flash back a table that was created last year. How far back can the flashback query go？（）A、3 hoursB、6 monthsC、until last yearD、until last commitE、until the point when the undotablespacewas refreshedF、until the database is shut down and the memory erased
You work as a database administrator for Supportcenter.cn. Your database is configured for automatic undo management. UNDO_RETENTION is set to 3 hours. You want to flash back a table that was created last year. How far back can the flashback query go？（）
- A、3 hours
- B、6 months
- C、until last year
- D、until last commit
- E、until the point when the undotablespacewas refreshed
- F、until the database is shut down and the memory erased
相关考题：
On Friday at 11:30 am you decided to flash back the database because of a user error that occurred at 8:30 am. Which option must you use to check whether a flashback operation can recover the database to the specified time? （）A. Check the alert log fileB. Query the V$FLASHBACK_DATABASE_LOG viewC. Query the V$RECOVERY_FILE_DEST_SIZE viewD.Query the V$FLASHBACK_DATABASE_STAT viewE. Check the value assigned for the UNDO_RETENTION parameter
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You want to use the Flashback Transaction Query feature to identify all the changes made to your database within a specific time period. What is a prerequisite for using the Flashback Transaction Query feature？（）A、 You must use automatic undo management in the database.B、 You must configure OMF in your database.C、 You must configure ASM for storing the datafiles.D、 You must multiplex the online redo log file.
You are working as a DBA at NetFx Corporation. You discover that the SCOTT schema is deleted by mistake. You decide to flash the database back to the time when the schema existed. Which view will you query to determine the estimated size of the flashback data that you require for your current target retention？（）A、 V$FLASHBACK_DATABASE_LOGB、 V$FLASHBACK_DATABASE_STATC、 V$DATABASED、 V$UNDOSTAT
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On Friday at 11:30 am you decided to flash back the database because of a user error that occurred at 8:30 am. Which option must you use to check whether a flashback operation can recover the database to the specified time? （）A、Check the alert log fileB、Query the V$FLASHBACK_DATABASE_LOG viewC、Query the V$RECOVERY_FILE_DEST_SIZE viewD、Query the V$FLASHBACK_DATABASE_STAT viewE、Check the value assigned for the UNDO_RETENTION parameter
You work as a database administrator for Certkiller .com. You want to create your database with the automatic undo management feature enable.Which two tasks must you perform to achieve this？（）A、Set the UNDO_RETENTION parameter to AUTO.B、Create an initial undo segment in undotablespace.C、Set the UNDO_RETENTION parameter to 900 or moreD、Set the initialization parameter UNDO_MANAGEMENT to AUTOE、Set the UNDO_MANAGEMENT parameter to the name of an undotablespace
You work as a database administrator for Certkiller .com. Your database is configured for automatic undo management. UNDO_RETENTION is set to 3 hours. You want to flash back a table that was created last year. How far back can the flashback query go？ （）A、3 hoursB、6 monthsC、until last yearD、until last commitE、until the point when the undotablespacewas refreshedF、until the database is shut down and the memory erased
You work as a database administrator for Supportcenter.cn. You want to create your database with the automatic undo management feature enable.Which two tasks must you perform to achieve this？（）A、Set the UNDO_RETENTION parameter to AUTO.B、Create an initial undo segment in undotablespace.C、Set the UNDO_RETENTION parameter to 900 or moreD、Set the initialization parameter UNDO_MANAGEMENT to AUTOE、Set the UNDO_MANAGEMENT parameter to the name of an undotablespace
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单选题You work as a database administrator at Certkiller .com. You are working in an online transaction processing （OLTP） environment. You realize that the salary for an employee， John， has been accidentally modified in the EMPLOYEEStable. Two days ago， the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area. Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected？（）A perform point-in-time recoveryB perform a Flashback Table operation to restore the table to the state it was in two days agoC perform a Flashback Database operation to restore the database to the state it was in two days agoD perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements， and then use them for recovery
单选题You want to use the Flashback Transaction Query feature to identify all the changes made to your database within a specific time period. What is a prerequisite for using the Flashback Transaction Query feature？（）A You must use automatic undo management in the database.B You must configure OMF in your database.C You must configure ASM for storing the datafiles.D You must multiplex the online redo log file.
多选题You need to ensure that the database users should be able to use the various flashback query features in order to go back in time by four hours. What would you do to achieve this?（）Aset SQL_TRACE=TrueBset UNDO_RETENTION=14400Cset FAST_START_MTTR_TARGET=240Dset LOG_CHECKPOINT_INTERVAL=240Eset DB_FLASHBACK_RETENTION_TARGET=14400Fset the RETENTION GUARANTEE clause for the undo tablespace
单选题You executed the following query in your database： FROM V$FLASHBACK_DATABASE_LOG; What would you determine from the output？（）Athe time when the last flashback operation in your database was performedBthe time when the first flashback operation in your database was performedCa list of flashback operations performed in your database using SCN and timeDthe approximate time and the lowest system change number （SCN） to which you can flash back your database
单选题What does the DB_FLASHBACK_RETENTION_TARGET parameter configure？（）A An upper limit on how far you can flash back the database，depending on the information in the redo logsB An upper limit on how far you can flash back the database，depending on the information in the undo tablespaceC The amount of time for which the flashback data is to be kept in the flash recovery area， provided that there is enough spaceD The amount of time for which the flashback data is guaranteed to be kept in the undo tablespace，provided that there is enough space
单选题You executed the following query in your database： SELECT oldest_flashback_scn， oldest_flashback_time FROM V$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 work as a database administrator for Supportcenter.cn. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it？（）AUses undo data for roll forwardBUses Flashback Log for recoveryCUses online redo logs to roll backDUses undo data to roll back the transactionEUses Recovery Manager （RMAN） to roll backFUses the System Monitor （SMON） background process to perform instance recovery
单选题You have a long-running process you want to assign to a specific UNDO segment brought online for that express purpose. You are not using automatic UNDO management. What statement can be used for this task? （）AALTER DATABASE BSET TRANSACTION CALTER ROLLBACK SEGMENT DALTER TABLE
单选题On Friday at 11:30 am you decided to flash back the database because of a user error that occurred at 8:30am. Which option must you use to check whether a flashback operation can recover the database to the specified time?（）ACheck the alert log fileBQuery the V$FLASHBACK_DATABASE_LOG viewCQuery the V$RECOVERY_FILE_DEST_SIZE viewDQuery the V$FLASHBACK_DATABASE_STAT viewECheck the value assigned for the UNDO_RETENTION parameter
多选题You work as a database administrator for Supportcenter.cn. You want to create your database with the automatic undo management feature enable.Which two tasks must you perform to achieve this？（）ASet the UNDO_RETENTION parameter to AUTO.BCreate an initial undo segment in undotablespace.CSet the UNDO_RETENTION parameter to 900 or moreDSet the initialization parameter UNDO_MANAGEMENT to AUTOESet the UNDO_MANAGEMENT parameter to the name of an undotablespace
单选题You are working as a DBA at NetFx Corporation. You discover that the SCOTT schema is deleted by mistake. You decide to flash the database back to the time when the schema existed. Which view will you query to determine the estimated size of the flashback data that you require for your current target retention？（）A V$FLASHBACK_DATABASE_LOGB V$FLASHBACK_DATABASE_STATC V$DATABASED V$UNDOSTAT
多选题You work as a database administrator for Certkiller .com. You want to create your database with the automatic undo management feature enable.Which two tasks must you perform to achieve this？（）ASet the UNDO_RETENTION parameter to AUTO.BCreate an initial undo segment in undotablespace.CSet the UNDO_RETENTION parameter to 900 or moreDSet the initialization parameter UNDO_MANAGEMENT to AUTOESet the UNDO_MANAGEMENT parameter to the name of an undotablespace