商业银行在出现短期资金缺口时，最后考虑的补平缺口的方式是（)。A．票据转贴现B．债券回购C．向中央银

A. The user has dropped an important table that needs to be recovered.

B. The database files are corrupted when the database is open.

C. You are not able to start up the database instance because the required database files are missing.

D. The archived log files are missing for which backup is not available.

A.Databaseisnotopen

B.Listenerisnotrunning

C.Servicenameisnotcorrect

D.WrongportnumberusedinURL

E.Usersysdoeshavethemediaprivilege

A.RECOVERY_CATALOG_OWNER

B.DBA

C.RESOURCE

D.SELECTANYDICTIONARY

E.CONNECT

, a big filetablespace of size 100 TB on tape drive, but you have tapedrives of only 10 GB each.Which method would accomplish the task quickly and efficiently?（）

A. parallel image copy backup

B. backup with MAXPIECESIZE configured for the channel

C. parallel backup with MAXPIECESIZE configured for the channel

D. intrafile parallel backup

A. You can join a maximum of two tables through an equijoin.

B. You can join a maximum of two columns through an equijoin.

C. You specify an equijoin condition in the SELECT or FROM clauses of a SELECT statement.

D. To join two tables through an equijoin, the columns in the join condition must be primary key and foreign key columns.

E. You can join n tables (all having single column primary keys) in a SQL statement by specifying a minimum of n-1 join conditions.

A. A virtual private catalog owner can create a local stored script, and have read/write access to a global stored script.

B. The virtual private catalog owner cannot create and modify the stored scripts.

C. The set of views and synonyms that make up the virtual private catalog is stored in the schema of the RMAN recovery catalog owner.

D. To perform most of the RMAN operations, the virtual catalog owner must have the SYSDBA or SYSOPER privilege on the target database

A.ItmustbeusedbecauseallRMAN-relatedbackupandrecoverymetadatainformationiscontainedinit.

B.Itprovidesaconvenient，optional，repositoryofbackup-andrecovery-relatedmetadata.

C.ItprovidestheabilitytostoreRMANscriptsforglobalusebyanydatabasethathasaccesstotherepository.

D.ItprovidesameansofstoringallRMANbackupsetsphysicallyinanOracledatabaseserver.

E.Itprovidestheabilitytostorebackuprecordsformorethanayear.

A. MAX

B. MIN

C. SUM

D. COUNT

E. TOTAL

F. LARGEST

Youhaveexecutedthiscommandtochangethesizeofthedatabasebuffercache：SQL>ALTERSYSTEMSETDB_CACHE_SIZE=2516582；Systemaltered.Toverifythechangeinsize，youexecutedthiscommand：SQL>SHOWPARAMETERDB_CACHE_SIZENAMETYPEVALUE------------------------------------------------db_cache_sizebiginteger4194304Whyisthevaluesetto4194304andnotto2516582（）

A.Because4194304isthegranulesize

B.Because4194304isthestandardblocksize

C.Because4194304isthelargestnonstandardblocksizedefinedinthedatabase

D.Because4194304isthetotalsizeofdataalreadyavailableinthedatabasebuffercache

A. partitioning recommendations

B. statistics collection recommendations

C. index creation recommendations

D. materialized view recommendations

E. materialized view log recommendations