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？（）A Uses undo data for roll forwardB Uses Flashback Log for recover

题目
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？（）
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

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.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

3.In which case would you use the Flashback Database feature to perform a recovery？（）A、to recover a dropped tablespaceB、to recover data from a truncated tableC、to recover a data file that has been shrunkD、to recover a database to the state that existed before the RESETLOGS operation

4.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？（）A、Uses undo data for roll forwardB、Uses Flashback Log for recoveryC、Uses online redo logs to roll backD、Uses undo data to roll back the transactionE、Uses Recovery Manager （RMAN） to roll backF、Uses the System Monitor （SMON） background process to perform instance recovery

参考答案和解析
正确答案： A
解析： 暂无解析
更多“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？（）A Uses undo data for roll forwardB Uses Flashback Log for recover”相关问题

  • 第1题：

    You work as a database administrator for Supportcenter.cn. 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， SupportCenter， 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:B,E

  • 第2题：

    You can use Oracle Flashback to look at past activity in your database. What are two other characteristics of Oracle Flashback？（）

    • A、Oracle Flashback uses undo information to construct consistent data. 
    • B、You can use a cursor opened while using an Oracle Flashback image to perform DML once you deactivate Oracle Flashback in your session. 
    • C、You can only use Oracle Flashback view of the data if the required records are still in the online redo log files. 
    • D、Oracle Flashback lists the DML that was executed during the period you identify when initiating your session. 

    正确答案:A,B

  • 第3题：

    Which three statements are true about Flashback Database?（）

    • A、Flashback logs are written sequentially, and are archived.
    • B、Flashback Database uses a restored control file to recover a database.
    • C、The Oracle database automatically creates, deletes, and resides flashback logs in the Fast Recovery Area.
    • D、Flashback Database can recover a database to the state that it was in before a reset logs operation.
    • E、Flashback Database can recover a data file that was dropped during the span of time of the flashback.
    • F、Flashback logs are used to restore to the blocks' before images, and then the redo data may be used to roll forward to the desired flashback time.

    正确答案:B,C,F

  • 第4题：

    You work as a database administrator for Supportcenter.cn. Users in the Supportcenter.cn PROD database complain about the slow response of transactions. While investigating the reason you find that the transactions are waiting for the undo segments to be available， and undo retention has been set to zero.  What would you do to overcome this problem？（）

    • A、Increase the undo return
    • B、Create more undo segments
    • C、Create another undotablespace
    • D、Increase the size of the undo tablespace

    正确答案:D

  • 第5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6题：

    多选题
    Which three statements are true about Flashback Database?（）
    A

    Flashback logs are written sequentially, and are archived.

    B

    Flashback Database uses a restored control file to recover a database.

    C

    The Oracle database automatically creates, deletes, and resides flashback logs in the Fast Recovery Area.

    D

    Flashback Database can recover a database to the state that it was in before a reset logs operation.

    E

    Flashback Database can recover a data file that was dropped during the span of time of the flashback.

    F

    Flashback logs are used to restore to the blocks' before images, and then the redo data may be used to roll forward to the desired flashback time.


    正确答案： B,C,F
    解析： 暂无解析

  • 第7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8题：

    单选题
    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： F
    解析： 暂无解析

  • 第9题：

    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？（）
    A

    Restore all the data files and open the database

    B

    Create the data file and perform tablespace recovery

    C

    No need to restore any file， just recover the database

    D

    Restore only the system data file and recover the database

    E

    Restore only lost date file and performtablespacerecovery


    正确答案： A
    解析： 暂无解析

  • 第10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11题：

    多选题
    You can use Oracle Flashback to look at past activity in your database. What are two other characteristics of Oracle Flashback？（）
    A

    Oracle Flashback uses undo information to construct consistent data.

    B

    You can use a cursor opened while using an Oracle Flashback image to perform DML once you deactivate Oracle Flashback in your session.

    C

    You can only use Oracle Flashback view of the data if the required records are still in the online redo log files.

    D

    Oracle Flashback lists the DML that was executed during the period you identify when initiating your session.


    正确答案： D,B
    解析： 暂无解析

  • 第12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13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

  • 第14题：

    You work as a database administrator for Certkiller .com. 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？（）

    • A、Restore all the data files and open the database
    • B、Create the data file and performtablespacerecovery
    • C、No need to restore any file， just recover the database
    • D、Restore only the system data file and recover the database
    • E、Restore only lost date file and performtablespacerecovery

    正确答案:A

  • 第15题：

    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

  • 第16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？（）

    • A、Restore all the data files and open the database
    • B、Create the data file and perform tablespace recovery
    • C、No need to restore any file， just recover the database
    • D、Restore only the system data file and recover the database
    • E、Restore only lost date file and performtablespacerecovery

    正确答案:A

  • 第17题：

    You are working on an Oracle Database 10g database that operates in the ARCHIVELOG mode. At 06：00 p.m.， you discovered that a table in the SYSTEM tablespace that does not belong to the data dictionary was dropped at 03：00 p.m. What would you do to recover the table？（）

    • A、 use the Flashback Transaction Query feature to identify the relevant SQL statement and use it to undrop the table
    • B、 restore the entire database from the most recent backup and open it
    • C、 recover the table by using the Flashback Table feature
    • D、 perform point-in-time recovery to recover the table

    正确答案:D

  • 第18题：

    单选题
    You are working on an Oracle Database 10g database that operates in the ARCHIVELOG mode. At 06：00 p.m.， you discovered that a table in the SYSTEM tablespace that does not belong to the data dictionary was dropped at 03：00 p.m. What would you do to recover the table？（）
    A

     use the Flashback Transaction Query feature to identify the relevant SQL statement and use it to undrop the table

    B

     restore the entire database from the most recent backup and open it

    C

     recover the table by using the Flashback Table feature

    D

     perform point-in-time recovery to recover the table


    正确答案： B
    解析： 暂无解析

  • 第19题：

    多选题
    You work as a database administrator for Supportcenter.cn. 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， SupportCenter， 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： C,A
    解析： 暂无解析

  • 第20题：

    单选题
    You work as a database administrator for Supportcenter.cn. Users in the Supportcenter.cn PROD database complain about the slow response of transactions. While investigating the reason you find that the transactions are waiting for the undo segments to be available， and undo retention has been set to zero.  What would you do to overcome this problem？（）
    A

    Increase the undo return

    B

    Create more undo segments

    C

    Create another undotablespace

    D

    Increase the size of the undo tablespace


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    You work as a database administrator for Certkiller .com. 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？（）
    A

    Restore all the data files and open the database

    B

    Create the data file and performtablespacerecovery

    C

    No need to restore any file， just recover the database

    D

    Restore only the system data file and recover the database

    E

    Restore only lost date file and performtablespacerecovery


    正确答案： E
    解析： 暂无解析

  • 第22题：

    单选题
    In which case would you use the Flashback Database feature to perform a recovery？（）
    A

    to recover a dropped tablespace

    B

    to recover data from a truncated table

    C

    to recover a data file that has been shrunk

    D

    to recover a database to the state that existed before the RESETLOGS operation


    正确答案： A
    解析： 暂无解析

  • 第23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

相关内容