单项选择题

Your database instance is configured with automatic undo management and the UNDO_RETENTIONparameter is set to 900 seconds. You executed the following command to enable retention guarantee:
SQL> ALTER TABLESPACE undotbs1 RETENTION GUARANTEE; 
What effect would this command have onthe database()

A.The extents in the undo tablespace retain data until the next full database backup.
B.The extents containing committed undo in the undo tablespace are not overwritten for at least 15 minutes.
C.The extents containing committed data in the undo tablespace are not overwritten until the instance is shutdown.
D.The extents containing committed undo in the undo tablespace are transferred to Flash Recovery Areabefore being overwritten


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2.单项选择题Which statement is true about the UNDO_RETENTION parameter when retention guarantee is not enabled()

A.It is the time period after which the undo data becomes obsolete.
B.It is the time period after which the committed undo data would be transferred to a temporary tablespace.
C.It is the minimum time period up to which the committed undo data would be retained if free undo space isavailable.
D.It is the time period after which the undo data is transferred to the Flash Recovery Area to provide readconsistency.

3.单项选择题

View the Exhibit and examine the undo tablespace attributes. Your database instance is experiencing a largevolume of transactions from non-DBA users in the last one hour. The undo tablespace UNDOTBS1 is full withtransactions and no transaction was committed more than one hour ago. The database has two more undotablespaces. 
What happens to the new DML operations in this scenario()

A.The DML commands will fail.
B.The undo data generated by the DML is stored in one of the two other undo tablespaces.
C.The undo data generated by the DML will overwrite the extents that contain committed undo data.
D.The undo data generated by the DML is stored in the SYSTEM undo segment of the SYSTEM tablespace

6.单项选择题

You are using Enterprise Manager to schedule backups for your database. 
Which type of script would begenerated by the backup scheduler()

A.XML script
B.PL/SQL script
C.Operating system scriptThis document was downloaded from =>> http://www.amaderforum.com
D.Recovery Manager (RMAN) script

7.单项选择题

in your database instance, the STATISTICS_LEVEL initialization parameter is set to BASIC. 
What is the impactof this setting()

A.Optimizer statistics are collected automatically.
B.Only timed operating system (OS) statistics and plan execution statistics are collected.
C.The snapshots for the Automatic Workload Repository (AWR) are not generated automatically.
D.Snapshots cannot be collected manually by using the DBMS_WORKLOAD_REPOSITORY package.
E.The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.

8.单项选择题

You execute the following command to audit 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 every successful DROP TABLE command executed in the session of SCOTT.
B.One audit record is generated for the session when SCOTT grants the DROP ANY TABLE privilege to otherusers.
C.One audit record is created for the whole session if user SCOTT successfully drops one or more tables inhis 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 drop Tables owned by SCOTT

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