钢筋电渣压力焊接头检验的必试项目是（）。A．抗拉强度B．抗压强度C．抗弯强度D．弯曲试验

A.CHANGE

B.RESYNC

C.CATALOG

D.CROSSCHECK

A.media

B.instance

C.statement

D.userprocess

e，butthenhangs.Aftercheckingthealertlog，youdeterminethatalltheonlineredologsneedarchiving.Whichstepwasskippedwhenyousetupautomaticarchivelog？（）

A.LOG_ARCHIVE_DESTwasnotsetintheparameterfile.

B.LOG_ARCHIVE_STARTwasnotsetintheparameterfile.

C.alterdatabasearchivelog；wasnotexecutedinMOUNTmode.

D.LOG_ARCHIVE_MAXprocesseswerenotsetintheparameterfile.

machines.Whentheclienttriestoconnect，itreceivesaTNSerror.Bycarefullyexaminingtheenvironment，atnsnames.oraisfoundonlyontheOracleservermachine，amongotherthings.Aftercopyingthistnsnames.oraontotheclientmachine，theclientisabletoconnecttotheserver.Whichstatementistrue？（）

A.tnsnames.oramustbeontheclientmachineforlocalnaming.

B.tnsnames.oramustberemovedfromtheserverfortheconnectiontowork.

C.tnsnames.oramustbeonboththeclientandservermachinesforlocalnaming.

D.tnsnames.oraisnotrequiredforlocalnaming;theproblemwasnotfixedbycopyingthefiletotheclient.

A.OnlytheSETcommandmustbewithinaRUNblock.

B.AllcommandsshouldbeexecutedattheRMANprompt.

C.AllthreecommandsmustbewithinasingleRUNblock.

D.OnlytheRESTOREandRECOVERcommandsmustbewithinasingleRUNblock.

Whenimportingatableintoadatabase，theimportprocessperformsthesetasks：1.Triggersareimported.2.Dataisimported.3.Newtablesarecreated.4.Indexesarebuilt.5.Anybitmap，functional，and/ordomainindexesarebuilt.6.Integrityconstraintsareenabledonthenewtables.Whichoptionshowsthetasksintheorderinwhichtheyareperformed？（）

A.2，3，4，1，6，5

B.3，2，4，1，6，5

C.3，2，6，4，1，5

D.4，2，3，1，5，6

A.Restorethedatafileandperformincompleterecovery.

B.Restorethedatafileandperformpoint-in-timerecover.

C.Dropthetablespaceandlosealldatainthetablespace.

D.Restorethedatabaseandlosealldatasincethelastbackup.

Youreceivedtheseerrormessagesbecausetheclientcannotfindthedesireddatabase：ORA-12198：TNS：couldnotpathtodestinationORA-12203：TNS：unabletoconnecttodestinationWhichactionwouldbeappropriateinhelpingtoresolvetheerrors？（）

A.A

B.B

C.C

OracleNetServicesiscomposedofseveralcommunicationlayers，knownasastack，whichenablesclientsanddatabaseseverstoshare，modify，andmanipulatedata.Whichrevealsthecorrectarchitecture，inhierarchicalorder，oftheclient-sidestack？（）

A.A

B.B

C.C

D.D

A.Eachtargetdatabaserequiresitsownrecovercatalog.

B.RMANscriptscanbestoredintherecoverycatalogorthetargetcontrolfile.

C.Achannelisastreamofdatatoadevicetypeandcorrespondstooneserversession.

D.TheRMANexecutableinterpretsseversessioncommandsandestablishesconnectionstothetarget database.