单选题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？ （

题目
单选题
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 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

相似考题

1.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

2.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?（）A、set SQL_TRACE=True B、set UNDO_RETENTION=14400 C、set FAST_START_MTTR_TARGET=240 D、set LOG_CHECKPOINT_INTERVAL=240 E、set DB_FLASHBACK_RETENTION_TARGET=14400 F、set the RETENTION GUARANTEE clause for the undo tablespace

3.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

4.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.

更多“单选题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？ （”相关问题

  • 第1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？（）

    • 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 more
    • D、Set the initialization parameter UNDO_MANAGEMENT to AUTO
    • E、Set the UNDO_MANAGEMENT parameter to the name of an undotablespace

    正确答案:D,E

  • 第2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？（）

    • 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 more
    • D、Set the initialization parameter UNDO_MANAGEMENT to AUTO
    • E、Set the UNDO_MANAGEMENT parameter to the name of an undotablespace

    正确答案:D,E

  • 第3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.

    正确答案:D

  • 第4题：

    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 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

    正确答案:D

  • 第5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? （）

    • A、ALTER DATABASE 
    • B、SET TRANSACTION 
    • C、ALTER ROLLBACK SEGMENT 
    • D、ALTER TABLE

    正确答案:B

  • 第6题：

    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 recovery

    B

     perform a Flashback Table operation to restore the table to the state it was in two days ago

    C

     perform a Flashback Database operation to restore the database to the state it was in two days ago

    D

     perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements， and then use them for recovery


    正确答案： B
    解析： 暂无解析

  • 第7题：

    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.


    正确答案： C
    解析： 暂无解析

  • 第8题：

    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?（）
    A

    set SQL_TRACE=True

    B

    set UNDO_RETENTION=14400

    C

    set FAST_START_MTTR_TARGET=240

    D

    set LOG_CHECKPOINT_INTERVAL=240

    E

    set DB_FLASHBACK_RETENTION_TARGET=14400

    F

    set the RETENTION GUARANTEE clause for the undo tablespace


    正确答案： E,F
    解析： 暂无解析

  • 第9题：

    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 logs

    B

     An upper limit on how far you can flash back the database，depending on the information in the undo tablespace

    C

     The amount of time for which the flashback data is to be kept in the flash recovery area， provided that there is enough space

    D

     The amount of time for which the flashback data is guaranteed to be kept in the undo tablespace，provided that there is enough space


    正确答案： B
    解析： 暂无解析

  • 第10题：

    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.


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    You work as a database administrator for Certkiller .com. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it？（）
    A

    Uses undo data for roll forward

    B

    Uses Flashback Log for recovery

    C

    Uses online redo logs to roll back

    D

    Uses undo data to roll back the transaction

    E

    Uses Recovery Manager （RMAN） to roll back

    F

    Uses the System Monitor （SMON） background process to perform instance recovery


    正确答案： D
    解析： 暂无解析

  • 第12题：

    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？（）
    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 more

    D

    Set the initialization parameter UNDO_MANAGEMENT to AUTO

    E

    Set the UNDO_MANAGEMENT parameter to the name of an undotablespace


    正确答案： A,C
    解析： 暂无解析

  • 第13题：

    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 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

    正确答案:A

  • 第14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 logs
    • B、 An upper limit on how far you can flash back the database，depending on the information in the undo tablespace
    • C、 The amount of time for which the flashback data is to be kept in the flash recovery area， provided that there is enough space
    • D、 The amount of time for which the flashback data is guaranteed to be kept in the undo tablespace，provided that there is enough space

    正确答案:C

  • 第15题：

    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

    正确答案:A

  • 第16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 recovery
    • B、 perform a Flashback Table operation to restore the table to the state it was in two days ago
    • C、 perform a Flashback Database operation to restore the database to the state it was in two days ago
    • D、 perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements， and then use them for recovery

    正确答案:D

  • 第17题：

    Flashback Database is enabled in your Oracle 10g database. One of your database users erroneously purged an important table residing in his schema. The table was purged sometime between 10：00 P.M. and 10：30 P.M. The next day， you decide to flash back the database. Before you flash back the database， you want to ensure that you have all the necessary flashback data. Which dynamic performance view must you use to determine whether you have the required flashback data to recover the purged table？（）

    • A、 V$DATABASE
    • B、 V$UNDOSTAT
    • C、 V$FLASHBACK_DATABASE_LOG
    • D、 V$FLASHBACK_DATABASE_STAT

    正确答案:C

  • 第18题：

    单选题
    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


    正确答案： D
    解析： 暂无解析

  • 第19题：

    多选题
    You work as a database administrator for Certkiller .com. One of the database users accidentally deleted all the rows of a critical table and committed the delete at 1：30 p.m. You senior database administrator， Certkiller， asks you to retrieve the lost data. Which two actions would you use to ensure that there is no impact on other connected users while retrieving the deleted rows？（）
    A

    Use a flashback query to retrieve the rows that were deleted

    B

    Useconventialincremental export and then import the affected object

    C

    Shutdown the database inNORMALmode and restart the database instance

    D

    Use DBMS_META package to reconstruct the object using undo segments

    E

    UseTablespacePoint in Time Recovery （TSPITR） method to recover the table and the data

    F

    Use Oracle DataPumptwithflashback_timeoption toentableflashback export and then import the affected object.


    正确答案： D,F
    解析： 暂无解析

  • 第20题：

    单选题
    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 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


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    Flashback Database is enabled in your Oracle 10g database. One of your database users erroneously purged an important table residing in his schema. The table was purged sometime between 10：00 P.M. and 10：30 P.M. The next day， you decide to flash back the database. Before you flash back the database， you want to ensure that you have all the necessary flashback data. Which dynamic performance view must you use to determine whether you have the required flashback data to recover the purged table？（）
    A

     V$DATABASE

    B

     V$UNDOSTAT

    C

     V$FLASHBACK_DATABASE_LOG

    D

     V$FLASHBACK_DATABASE_STAT


    正确答案： B
    解析： 暂无解析

  • 第22题：

    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?（）
    A

    Check the alert log file

    B

    Query the V$FLASHBACK_DATABASE_LOG view

    C

    Query the V$RECOVERY_FILE_DEST_SIZE view

    D

    Query the V$FLASHBACK_DATABASE_STAT view

    E

    Check the value assigned for the UNDO_RETENTION parameter


    正确答案： C
    解析： 暂无解析

  • 第23题：

    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？（）
    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 more

    D

    Set the initialization parameter UNDO_MANAGEMENT to AUTO

    E

    Set the UNDO_MANAGEMENT parameter to the name of an undotablespace


    正确答案： B,C
    解析： 暂无解析

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