You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the

题目

You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?（）

  • A、Restore the backup control file and open the database with RESETLOGS option.
  • B、Perform point-in-time recovery because flashback cannot be performed again on this table
  • C、Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571
  • D、Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571
相似考题

1.Before a Flashback Table operation, you execute the following command:ALTER TABLE employees ENABLE ROW MOVEMENT;Why would you need this to be executed?()A. Because row IDs may change during the flashback operationB. Because the object number changes after the flashback operationC. Because the rows are retrieved from the recycle bin during the flashback operationD. Because the table is moved forward and back to a temporary during the flashback opertion

2.On Jan 11， 2005 at 2：30 P.M.， an erroneous update operation modified all the values of column LASTNAME in the EMPLOYEE table in the Scott schema to an empty string. You are the system administrator， and you want to return the original values in the table. To do so， you decided to flash back the table. Which two options can you use to flash back a table？（）A、 by using Oracle Enterprise ManagerB、 by issuing the FLASHBACK TABLE statement at the RMAN promptC、 by issuing the FLASHBACK TABLE statement at the SQL promptD、 by issuing the FLASHBACK TABLE statement at the LSNRCTL prompt

3. Before a Flashback Table operation, you execute the following command: ALTER TABLE employees ENABLE ROW MOVEMENT; Why would you need this to be executed?（）A、Because row IDs may change during the flashback operationB、Because the object number changes after the flashback operationC、Because the rows are retrieved from the recycle bin during the flashback operationD、Because the table is moved forward and back to a temporary during the flashback opertion

4.You want to flash back a test database by five hours.You issue this command:SQL > FLASHBACK DATABASE TO TIMESTAMP (SYSDATE － 5／24);Which two statements are true about this flashback scenario?()A. The database must have multiplexed redo logs for the flashback to succeed.B. The database must be MOUNTED for the flashback to succeed.C. The database must use block change tracking for the flashback to succeed.D. The database must be opened in restricted mode for the flashback to succeed.E. The database must be opened with the RESETLOGS option after the flashback is complete.F. The database must be opened in read-only mode to check if the database has been flashed back to the correct SCN.

更多“You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the ”相关问题

  • 第1题：

    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 EMPLOYEES table. 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2题：

    In one of your online transaction processing （OLTP） applications， users are manipulating and querying a database table simultaneously. From the Segment Advisor， you find that one of the tables is highly fragmented and you want to shrink the table immediately without affecting the currently active queries.  Which option would you use with the ALTER TABLE command to achieve this objective？（）

    • A、REBUILD
    • B、CASCADE
    • C、TRUNCATE
    • D、ROW MOVEMENT
    • E、SHRINK SPACE COMPACT
    • F、SHRINK SPACE CASCADE

    正确答案: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 are working in an online transaction processing （OLTP） environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command， the System Change Number （SCN） was 663571. After flashing back the CUSTOMERS table， you realize that the table is not in the correct state and the resultant changes are not what you had desired. So， you need to reverse the effects of the FLASHBACK TABLE command while ensuring that：  a） No other user data in the database is affected.  b） The operation takes the minimum possible time.  Which option would you choose？（）

    • A、use the ROLLBACK command with SCN 663571
    • B、perform Flashback Transaction Query with SCN 663571
    • C、execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571
    • D、execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571

    正确答案:D

  • 第5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6题：

    You are performing flashback of the ORDERS table in the Scott’s schema because some important data is deleted in the table by mistake. The SCN number was 771513 at the time of deletion. You issued the following statement to perform Flashback Table：  SQL> FLASHBACK TABLE ORDERS TO SCN 771513；   What is the prerequisite to perform Flashback Table？（）

    • A、 You must configure OMF in your database.
    • B、 You must enable block change tracking feature in your database.
    • C、 You must enable ROW MOVEMENT feature on the ORDERS table.
    • D、 You must use the Flashback Version Query before using the Flashback Table feature.

    正确答案:C

  • 第7题：

    单选题
    You are working in an online transaction processing （OLTP） environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command， the System Change Number （SCN） was 663571. After flashing back the CUSTOMERS table，you realize that the table is not in the correct state and the resultant changes are not what you had desired. So， you need to reverse the effects of the FLASHBACK TABLE command while ensuring that：  a） No other user data in the database is affected.  b） The operation takes the minimum possible time.  Which option would you choose？（）
    A

    use the ROLLBACK command with SCN 663571

    B

    perform Flashback Transaction Query with SCN 663571

    C

    execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571

    D

    execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    In one of your online transaction processing （OLTP） applications， users are manipulating and querying a database table simultaneously. From the Segment Advisor， you find that one of the tables is highly fragmented and you want to shrink the table immediately without affecting the currently active queries. Which option would you use with the ALTER TABLE command to achieve this objective？（）
    A

     REBUILD

    B

     CASCADE

    C

     TRUNCATE

    D

     ROW MOVEMENT

    E

     SHRINK SPACE COMPACT

    F

     SHRINK SPACE CASCADE


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    You are performing flashback of the ORDERS table in the Scott’s schema because some important data is deleted in the table by mistake. The SCN number was 771513 at the time of deletion. You issued the following statement to perform Flashback Table：  SQL> FLASHBACK TABLE ORDERS TO SCN 771513；   What is the prerequisite to perform Flashback Table？（）
    A

     You must configure OMF in your database.

    B

     You must enable block change tracking feature in your database.

    C

     You must enable ROW MOVEMENT feature on the ORDERS table.

    D

     You must use the Flashback Version Query before using the Flashback Table feature.


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    You are working in an online transaction processing （OLTP） environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command， the System Change Number （SCN） was 663571. After flashing back the CUSTOMERS table， you realize that the table is not in the correct state and the resultant changes are not what you had desired. So， you need to reverse the effects of the FLASHBACK TABLE command while ensuring that：  a） No other user data in the database is affected.  b） The operation takes the minimum possible time.  Which option would you choose？（）
    A

     Use ROLLBACK command with SCN 663571.

    B

     Perform Flashback Transaction Query with SCN 663571.

    C

     Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571.

    D

     Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571.


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    Before a Flashback Table operation，you execute the following command：   ALTER TABLE employees ENABLE ROW MOVEMENT；   Why would you need this to be executed？（）
    A

     Because row IDs may change during the flashback operation

    B

     Because the object number changes after the flashback operation

    C

     Because the rows are retrieved from the recycle bin during the flashback operation

    D

     Because the table is moved forward and back to a temporary during the flashback opertion


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    You are working on an online transaction processing （OLTP） system. You notice that a PL/SQL procedure got executed twice at 2） 00 p.m. This has incorrectly updated the EMP_SAL table. How would you revert the table to its state at 2） 00 p.m.？（）
    A

    Perform point-in-time recovery to 2： 00 p.m.

    B

    Use Flashback Table feature to revert the changes.

    C

    Restore the entire database from the recent backup and open it.

    D

    Issue the rollback statement with system change number （SCN）.


    正确答案： A
    解析： 暂无解析

  • 第13题：

    Your database is running in the ARCHIVELOG mode. You have configured RMAN for backup and recovery operations. You execute the following command from the RMAN prompt：   RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON；   After executing this command， in which of the following cases will RMAN make an auto-backup of the control file？ （）

    • A、 when you change the name of a datafile
    • B、 when you drop a table from the database
    • C、 when you take an export of the database
    • D、 when you back up the database using OS utilities
    • E、 when you issue an ALTER SYSTEM SWITCH LOGFILE statement
    • F、 when you issue a BACKUP command from inside the RMAN run block

    正确答案:A,E,F

  • 第14题：

    Which two statements are correct regarding the Oracle Flashback Drop feature？ （）

    • A、 Recycle bin exists for the tables only in non-SYSTEM， locally managed tablespaces.
    • B、 You can flash back a dropped table provided row movement has been enabled on the table.
    • C、 If you drop an index before dropping its associated table， then the recovery of the index is not supported when you flash back the dropped table.
    • D、 When you execute the DROP TABLESPACE？ INCLUDING CONTENTS command， the objects in the tablespace are places in the recycle bin.
    • E、 When a dropped table is moved to the recycle bin， only the table is renamed to a system-generated name； its associated objects and constraints are not renamed.
    • F、 If you drop a table that is protected by the recycle bin， then associated bitmap-joined indexes and materialized view logs are also stored in the recycle bin.

    正确答案:A,C

  • 第15题：

    You are working on an online transaction processing （OLTP） system. You notice that a PL/SQL procedure got executed twice at 2） 00 p.m. This has incorrectly updated the EMP_SAL table. How would you revert the table to its state at 2） 00 p.m.？（）

    • A、Perform point-in-time recovery to 2： 00 p.m.
    • B、Use Flashback Table feature to revert the changes.
    • C、Restore the entire database from the recent backup and open it.
    • D、Issue the rollback statement with system change number （SCN）.

    正确答案:B

  • 第16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17题：

    You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?（）

    • A、Restore the backup control file and open the database with RESETLOGS option.
    • B、Perform point-in-time recovery because flashback cannot be performed again on this table
    • C、Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571
    • D、Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571

    正确答案:D

  • 第18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19题：

    多选题
    Your database is running in the ARCHIVELOG mode. You have configured RMAN for backup and recovery operations. You execute the following command from the RMAN prompt：   RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON；   After executing this command， in which of the following cases will RMAN make an auto-backup of the control file？ （）
    A

    when you change the name of a datafile

    B

    when you drop a table from the database

    C

    when you take an export of the database

    D

    when you back up the database using OS utilities

    E

    when you issue an ALTER SYSTEM SWITCH LOGFILE statement

    F

    when you issue a BACKUP command from inside the RMAN run block


    正确答案： D,B
    解析： 暂无解析

  • 第20题：

    多选题
    On Jan 11， 2005 at 2：30 P.M.， an erroneous update operation modified all the values of column LASTNAME in the EMPLOYEE table in the Scott schema to an empty string. You are the system administrator， and you want to return the original values in the table. To do so， you decided to flash back the table. Which two options can you use to flash back a table？（）
    A

    by using Oracle Enterprise Manager

    B

    by issuing the FLASHBACK TABLE statement at the RMAN prompt

    C

    by issuing the FLASHBACK TABLE statement at the SQL prompt

    D

    by issuing the FLASHBACK TABLE statement at the LSNRCTL prompt


    正确答案： A,B
    解析： 暂无解析

  • 第21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22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23题：

    单选题
    In one of your online transaction processing （OLTP） applications， users are manipulating and querying a database table simultaneously. From the Segment Advisor， you find that one of the tables is highly fragmented and you want to shrink the table immediately without affecting the currently active queries.  Which option would you use with the ALTER TABLE command to achieve this objective？（）
    A

    REBUILD

    B

    CASCADE

    C

    TRUNCATE

    D

    ROW MOVEMENT

    E

    SHRINK SPACE COMPACT

    F

    SHRINK SPACE CASCADE


    正确答案： B
    解析： 暂无解析

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