多选题Which two statements are correct regarding the Flashback Versions Query feature？（）AYou can use this feature to identify the committed versions of the rows， but not the uncommitted versions.BYou can use this feature to identify the versions of V$ views.

第1题：

You are working on an Oracle Database 10g database. You enabled the Flashback Database feature. Which two statements regarding flashback logs are true？ （）

• A、 Flashback logs are not archived.
• B、 Flashback logs are maintained in redo log files.
• C、 Flashback logs are maintained in the Flash Recovery Area.
• D、 Flashback logs are used to maintain Flashback Database related errors.
• E、 Flashback logs need to be cleared manually after you disable Flashback Database.

第2题：

Which two of these statements regarding RSTP are correct? （）

• A、RSTP cannot operate with PVST+.
• B、RSTP defines new port roles.
• C、RSTP defines no new port states.
• D、RSTP is a proprietary implementation of IEEE 802.1D STP.
• E、RSTP is compatible with the original IEEE 802.1D STP.

第3题：

Which two statements regarding JUNOS architecture are correct？（）

• A、The Routing Engine handles all exception traffic.
• B、The Routing Engine synchronizes the route table with the PFE
• C、The Routing Engine is hot-pluggable.
• D、The Routing Engine controls the PFE

第4题：

Which two statements are correct regarding the Flashback Versions Query feature？（）

• A、 You can use this feature to identify the committed versions of the rows， but not the uncommitted versions.
• B、 You can use this feature to identify the versions of V$ views.
• C、 You can use this feature to identify the inserts， deletes， and updates performed on a particular row but not the data definition language （DDL） operations performed on the table.
• D、 You can use this feature for a table only if row movement is enabled for the table.
• E、 You can use this feature to identify the versions of external and fixed tables.

第5题：

These are the details about V$FLASHBACK_DATABASE_STAT： SQL> DESC v$FLASHBACK_DATABASE_STAT  Name                    Null？              Type  ------------- -------- --------------  BEGIN_TIME                               DATE  END_TIME                                 DATE  FLASHBACK_DATA                        NUMBER  DB_DATA                                  NUMBER  REDO_DATA                               NUMBER  ESTIMATED_FLASHBACK_SIZE             NUMBER  Which two statements regarding the V$FLASHBACK_DATABASE_STATview aretrue？ （）

• A、 BEGIN_TIME is the time at which Flashback logging is enabled.
• B、 END_TIME is the time at which the query is executed on the view.
• C、 REDO_DATA is the number of bytes of redo data written during the interval.
• D、 This view contains information about flashback data pertaining to the last 24 hours.
• E、 FLASHBACK_DATA is the amount of flashback data generated since the database was opened.

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第11题：

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

• A、Flashback Table can be performed on system tables.
• B、Flashback Table operation does not shrink the segments.
• C、Flashback Table uses log mining to extract SQL_REDO and SQL_UNDO statements.
• D、Flashback Table operation acquires exclusive data manipulation language (DML) locks.

第12题：

Which two statements regarding SNMP monitoring of a UCS system are correct?（）

• A、SNMP v3 is supported
• B、includes same MIBs as the Cisco Nexus7000
• C、does not provides MIBs downstream of the fabric interconnect
• D、includes same MIBs as the Cisco Nexus2000

第13题：

The RECYCLEBIN parameter is set to ON for your database. You drop a table, PRODUCTS, from the SCOTT schema. Which two statements are true regarding the outcome of this action? （）(Choose two)

• A、All the related indexes and views are automatically dropped
• B、The flashback drop feature can recover only the table structure
• C、Only the related indexes are dropped whereas views are invalidated
• D、The flashback drop feature can recover both the table structure and its data

第14题：

The RECYCLEBIN parameter is set to ON for your database. You drop a table，PRODUCTS，from the SCOTT schema.  Which two statements are true regarding the outcome of this action？（）

• A、 All the related indexes and views are automatically dropped
• B、 The flashback drop feature can recover only the table structure
• C、 Only the related indexes are dropped whereas views are invalidated
• D、 The flashback drop feature can recover both the table structure and its data

第15题：

You executed the following FLASHBACK TABLE command： FLASHBACK TABLE emp TO TIMESTAMP （’11：45’，’hh12：mi’）； Which two statements are correct？ （）

• A、 The FLASHBACK TABLE statement will not be written to the alert log file.
• B、 The EMP table that was dropped by mistake from the database will be restored.
• C、 The changes made to the EMP table since the specified time will be undone.
• D、 The FLASHBACK TABLE statement will not maintain the existing indexes on the EMP table.
• E、 The FLASHBACK TABLE statement will be executed within a single transaction.
• F、 The list of transactions that have modified the EMP table since the specified time will be displayed.

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