多选题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？（）AALTER DATABASE FLASHBACK ONBGRANT SELECT any transaction TO scottCGRANT EXECUT

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：

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

第3题：

The session of user SCOTT receives the following error after executing an UPDATE command onthe EMP table：  ERROR at line 1：  ORA-00060： deadlock detected while waiting for resource  On investigation， you find that a session opened by user JIM has a transaction that caused the deadlock.  two statements are true regarding the session of SCOTT in this scenario（）

• A、The session is terminated after receiving the error and JIM can continue with his transaction.
• B、SCOTT should perform a COMMIT or ROLLBACK to allow JIM to continue with his transaction.
• C、The session is rolled back after receiving the error and JIM can continue with his transaction.
• D、SCOTT has to reexecute the last command in the transaction after he commits the transaction.

第4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

第5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6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7题：

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

• 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8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

第9题：

第10题：

第11题：

第12题：

第13题：

You are shrinking the SCOTT.EMP table by executing the ALTER TABLE SCOTT.EMP SHRINK SPACE CASCADE statement. What is a prerequisite for shrinking the SCOTT.EMP table？（）

• A、 You must enable the block change tracking feature.
• B、 You must have enable the flashback feature.
• C、 You must use the OMF in your database.
• D、 You must define the tablespace of the SCOTT.EMP table for automatic segment space management.

第14题：

You are working as a DBA at NetFx Corporation. You discover that the SCOTT schema is deleted by mistake. You decide to flash the database back to the time when the schema existed. Which view will you query to determine the estimated size of the flashback data that you require for your current target retention？（）

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

第15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16题：

You execute the following command to audit the database activities：   SQL> AUDIT DROP ANY TABLE BY scott BY SESSION WHENEVER SUCCESSFUL；  What is the effect of this command？（）

• A、One audit record is created for the whole session if user SCOTT successfully drops one or more tables in his session.
• B、One audit record is created for every session when any user successfully drops a table owned by SCOTT.
• C、One audit record is created for each successful DROP TABLE command executed by any user to drop tables owned by SCOTT.
• D、One audit record is generated for the session when SCOTT grants the DROP ANY TABLE privilege to other users in his session.
• E、One audit record is created for each successful DROP TABLE command executed in the session of SCOTT.

第17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

第18题：

You execute the following command toauditdatabase activities：  SQL>AUDITDROP ANY TABLE BY scott BY SESSION WHENEVER SUCCESSFUL；  What is the effect of this command（）

• A、Oneauditrecord is created for every successful DROP TABLE command executed in the session ofSCOTT.
• B、Oneauditrecord is generated for the session when SCOTT grants the DROP ANY TABLE privilege toother users.
• C、One audit record is created for the whole session if user SCOTT successfully drops one or more tablesin his session.
• D、One audit record is created for every session of any other user in which a table owned by SCOTT isdropped successfully.
• E、One audit record is created for every successful DROP TABLE command executed by any user to droptables owned by SCOTT.

第19题：

Flashback is enabled for your multitenant container database (CDB), which contains two pluggable database (PDBs). A local user was accidently dropped from one of the PDBs. You want to flash back the PDB to the time before the local user was dropped. You connect to the CDB and execute the following commands: SQL > SHUTDOWN IMMEDIATE SQL > STARTUP MOUNT SQL > FLASHBACK DATABASE to TIME “TO_DATE (‘08/20/12’ , ‘MM/DD/YY’)”; Examine following commands: 1. ALTER PLUGGABLE DATABASE ALL OPEN; 2. ALTER DATABASE OPEN; 3. ALTER DATABASE OPEN RESETLOGS; Which command or commands should you execute next to allow updates to the flashback back schema?（）

• A、Only 1
• B、Only 2
• C、Only 3
• D、3 and 1
• E、1 and 2

第20题：

第21题：

第22题：

第23题：

第24题：