静态随机存储器可以用双极型器件构成，也可以由MOS型器件构成。双极型器件与MOS型器件相比，下面哪

A.Usesundodataforrollforward

B.UsesFlashbackLogforrecovery

C.Usesonlineredologstorollback

D.Usesundodatatorollbackthetransaction

E.UsesRecoveryManager（RMAN）torollback

F.UsestheSystemMonitor（SMON）backgroundprocesstoperforminstancerecovery

same system with the name DUPDB.You issued the following RMAN commands to create a duplicate database:Which three are the prerequisites for the successful execution of the above command?（）

A. The source database should be open

B. The target database should be in ARCHIVELOG mode if it is open

C. RMAN should be connected to both the instances as SYSDBA

D. The target database backups should be copied to the source database backup directories

E. The password file must exist for the source database and have the same SYS user password as the target

A.YoumustensurethattheSALESdatabaseismountedoropen.

B.Youmustrestoreabackupcontrolfiletoperformablockmediarecovery.

C.Youmusttakethetools01.dbfdatafileofflinebeforeyoustartablockmediarecovery.

D.YoumustputthedatabaseinNOARCHIVELOGmodetoperformablockmediarecovery.

E.Youcanperformonlyacompletemediarecoveryofindividualblocks；point-in-timerecoveryofindividualdatablocksisnotsupported.

A. SQL Access Advisor recommendations are automatically implemented.

B. Individual SQL Access Advisor recommendations can be scheduled for implementation.

C. All SQL Access Advisor recommendations for a specific task must be implemented at the same time.

D. SQL Access Advisor recommendations are automatically scheduled for implementation during the maintenance window.

E. None of the above.

Inyourdatabaseinstance，theusersessionsareconnectedtothedatabaseserverfromtheremotemachines.Youwanttoachievethefollowingfortheseusers：1.Theuseraccountmustbelockedafterfourunsuccessfulloginattempts.2.Theusermustbepromptedtochangethepasswordatregularintervals.3.Theusermaynothavemorethanthreesimultaneoussessions.4.Theusersessionmustautomaticallybeloggedoffifmorethan10minuteselapsedtimeused.Howwouldyouaccomplishtheabove（）

A.Byassigningprofilesfortheusers

B.ByimplementingFine-GrainedAuditing（FGA）

C.Bygrantingasecureapplicationroletotheusers

D.ByimplementingtheDatabaseResourceManagerplan

A. Binary data up to 4 gigabytes.

B. Character data up to 4 gigabytes.

C. Raw binary data of variable length up to 2 gigabytes.

D. Binary data stored in an external file, up to 4 gigabytes.

E. A hexadecimal string representing the unique address of a row in its table.

A.restore

B.repair

C.copy

D.recover

E.replace

A. Create new indexes.

B. Modify existing indexes.

C. Implement partitioning on a nonpartitioned table.

D. Create materialized views.

E. All of the above

A. It cannot generate recommendations that support multiple workload queries.

B. It can recommend partitioning on tables provided that the workloads have some predicates and joins on the columns of the NUMBER or DATE type.

C. It can recommend partitioning only on tables that have at least 10,000 rows.

D. It can recommend only B-tree indexes and not bitmap or function-based indexes

NotethefollowingpointsdescribingvariousutilitiesinOracleDatabase1g：1.Itenablesthehigh-speedtransferofdatafromonedatabasetoanother.2.Itprovidesacompletesolutionforthebackup，restoration，andrecoveryneedsoftheentiredatabase.3.ItenablestheloadingofdatafromanexternalfileintoanOracledatabase.4.ItprovidesatapebackupmanagementfortheOracleecosystem.WhichpointdescribesOracleSecureBackup（）

A.1

B.2

C.3

D.4

E.1，2，and4

F.1，2，3，and4