多选题Which two are the prerequisites to enable Flashback Data Archive?（） (Choose two.)ADatabase must be running in archivelog mode.BAutomatic undo management must be enabled.CUndo retention guarantee must be enabled.DThe tablespace on which the Flashback Da

第1题：

User SCOTT wants to back out the transactions on the REGIONS table in his schema. As a DBA, which commands must you execute to enable SCOTT to flash back the transactions?（）

• A、ALTER DATABASE FLASHBACK ON;
• B、GRANT SELECT any transaction TO scott;
• C、GRANT EXECUTE ON dbms_flashback TO scott;
• D、ALTER DATABASE ADD SUPPLEMENTAL LOG DATA;
• E、ALTER TABLESPACE undots1 RETENTION GUARANTEE;
• F、ALTER DATABASE ADD SUPPLEMENTAL LOG DATA (PRIMARY KEY) COLUMNS;

第2题：

Which are the prerequisites for performing flashback transactions on your database？（）

• A、 Undo retention guarantee for the database must be configured.
• B、 Supplemental log must be enabled for the primary key.
• C、 Supplemental log must be enabled.
• D、 Execute permission on the DBMS_FLASHBACK package must be granted to the user.

第3题：

You must track all transactions that modify certain tables in the sales schema for at least three years. Automatic undo management is enabled for the database with a retention of one day. Which two must you do to track the transactions?（）

• A、Enable supplemental logging for the database.
• B、Specify undo retention guarantee for the database.
• C、Create a Flashback Data Archive in the tablespace where the tables are stored.
• D、Create a Flashback Data Archive in any suitable tablespace.
• E、Enable Flashback Data Archiving for the tables that require tracking

第4题：

What are the prerequisites for performing flashback transactions? （）(Choose all that apply)

• A、Supplemental log must be enabled
• B、Supplemental log must be enabled for the primary key
• C、Undo retention guarantee for the database must be configured
• D、”EXECUTE “ permission on the DBMS_FLASHBACK package must be granted to the user

第5题：

Which two are the prerequisites to enable Flashback Data Archive?（） (Choose two.)

• A、Database must be running in archivelog mode.
• B、Automatic undo management must be enabled.
• C、Undo retention guarantee must be enabled.
• D、The tablespace on which the Flashback Data Archive is created must be managed with Automatic Segment Space Management (ASSM).

第6题：

Which two are the prerequisites to enable Flashback Data Archive？（）

• A、 Database must be running in archivelog mode.
• B、 Automatic undo management must be enabled.
• C、 Undo retention guarantee must be enabled.
• D、 The tablespace on which the Flashback Data Archive is created must be managed with Automatic Segment  Space Management （ASSM）.

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第13题：

What two are the prerequisites for enabling Flashback Database?（） (Choose two)

• A、The database must be in ARCHIVELOG mode
• B、The database must be in MOUNT EXCLUSIVE mode
• C、The database must be opened in RESTRICTED mode
• D、The database instance must be started in the NOMOUNT state
• E、The database instance must have the keep buffer pool defined

第14题：

You need to maintain a record of all transactions on some tables for at least three years. Automatic undo management is enabled for the database. What must you do accomplish this task？（）

• A、 Enable supplemental logging for the database.
• B、 Specify undo retention guarantee for the database
• C、 Create Flashback Data Archive in the tablespace where the tables are stored.
• D、 Create Flashback Data Archive and enable Flashback Data Archive for specific tables

第15题：

Which are the two prerequisites before setting up Flashback Data Archive? （）(Choose two.)

• A、Flash recovery area must be defined
• B、Undo retention guarantee must be enabled.
• C、Database must be running in archivelog mode.
• D、Automatic undo management must be enabled.
• E、The tablespace in which the Flashback Data Archive is created must have automatic segment space Management (ASSM).

第16题：

You are working as a DBA on the decision support system. There is a business requirement to track and store all transactions for at least three years for a few tables in the database. Automatic undo management is enabled in the database.  Which configuration should you use to accomplish this task？（）

• A、 Enable Flashback Data Archive for the tables.
• B、 Specify undo retention guarantee for the database.
• C、 Enable supplemental logging for the database.
• D、 Query V$UNDOSTAT to determine the amount of undo that will be generated and create an undo  tablespace for that size.
• E、 Create Flashback Data Archive on the tablespace on which the tables are stored.

第17题：

Which two are prerequisites for performing a flashback transaction?（）

• A、Flashback Database must be enabled.
• B、Undo retention guarantee for the database must be configured.
• C、EXECUTE privilege on the DBMS_FLASHBACK package must be granted to the user flashing back transaction.
• D、Supplemental logging must be enabled.
• E、Recycle bin must be enabled for the database.
• F、Block change tracking must be enabled tor the database.

第18题：

Which of the following statements is true regarding implementing a Flashback Table recovery？  （）

• A、 An SCN is never used to perform a Flashback Table recovery.
• B、 If a significant number of changes have been made to the table， row movement must be enabled.
• C、 The tablespace must be offline before performing a Flashback Table recovery.
• D、 Flashback Table recovery is completely dependent on the availability of undo data in the undo  tablespace.

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