约公元前3000年左右，苏美尔开始出现城市国家，先后出现的重要城市国家里不包括乌尔。（)A．正确B．错

isks. One of the disks in the disk group becomes unavailable because of power failure. You issued the following command to change the DISK_REPAIR_TIME attribute from 3.6 hours to 5 hours:ALTER DISKGROUP dg01 SET ATTRIBUTE ‘disk_repair_time‘ = ‘5h‘;To which disks in the disk group will the new value be applicable?（）

A. all disks in the disk group

B. all disks that are currently in OFFLINE mode

C. all disks that are not currently in OFFLINE mode

D. all disks in the disk group only if all of them are ONLINE

A.rowlevel

B.blocklevel

C.objectlevel

D.schemalevel

E.databaselevel

A.Line 33 must be called within a try block.

B.The exception thrown by method1 in class A is not required to be caught.

C.The method declared on line 31 must be declared to throw a RuntimeException.

D.On line 5 of class A, the call to method2 of class B does not need to be placed in a try/catch block.

A.BACKGROUND_DUMP_DEST

B.FOREGROUND_DUMP_DEST

C.CORE_DUMP_DEST

D.USER_DUMP_DEST

E.DIAGNOSTIC_DEST

F.Alloftheabove

A.TheORCLinstanceisregistereddynamicallywiththelistener.

B.TheORCLinstanceisregisteredstaticallyinthelistener.orafile.

C.Thenumberofcurrentclientconnectionshandledbytheservicehandleristwo.

D.Thetotalnumberofclientconnectionshandledsofarbytheservicehandleristwo

A. It forces BasicFiles to be created even if the SECUREFILE option is specified to create the LOB

B. It forces SecureFiles to be created even if the BASICFILE option is specified to create the LOB

C. It does not allow the creation of SecureFiles and generates an error if the SECUREFILE option is specified to create the LOB

D. It ignores the SECUREFILE option only if a Manual Segment Space Management tablespace is used and creates a BasicFile

ontainsthevaluefor25states.ThetableisfrequentlyqueriedontheSTATE_CODEcolumn.Whichtypeofindexwouldyousuggesttoimprovethequeryperformance？（）

A.Btree

B.bitmap

C.reversekey

D.functionbased

A.TRUNCATEthearchivetable.

B.DROPtheFlashbackDataArchive.

C.Nothing；expiredrowsareautomaticallyremoved.

D.Nothing；expiredrowsaremovedtoanarchivetable.

E.Deleteentriesfromthearchivewherethemetadatadateretainedisgreaterthantheretentionperiod.

A.Tablespacename

B.Storagequota

C.Retention

D.Tablename

E.Createadefaultarchive

A.Itfailsifanyexistingrowviolatestheconstraint.

B.Itdoesnotvalidatetheexistingdatainthetable.

C.Itenablestheconstrainttobeenforcedattheendofeachtransaction.

D.Itpreventsinsert，update，anddeleteoperationsonthetablewhiletheconstraintisintheprocessofbeingenabled.