单项选择题
单项选择题 Youareusingthefollowingcommandtoclearthelogfilegroup:ALTERDATABASECLEARLOFFILEGROUP2;Inwhichcasewouldthecommandbesuccessful?()
判断题 5GNR中的CU-DU分离架构便于实现RAN的虚拟化。( )
单项选择题 Youwanttoconfigureandscheduleofflinedatabasebackupstorunautomatically.Whichtoolorutilitywouldyouusetoachievethis()
单项选择题 Youhavearead-onlytablespaceonread-onlymedia.Youwanttoperformamediarecoveryontheexistingdatafiles,butusingabackupcontrolfile.Thebackupcontrolfileindicatesthatthestatusoftheread-onlytablespacewasread/writewhenthecontrolfilewasbackedup.Whatshouldyouconsider?()A.takedatafilesfromtheread-onlytablespaceofflinebeforeperformingarecoveryB.recoveryusingbackupcontrolfileisnotpossible,sorestoreallthefilesfromthelastfulldatabasebackup,andthenopenthedatabaseC.droptheread-onlytablespaceandre-createthetablespaceafterrecoveryD.performarecovery;statusofthetablespaceincontrolfilewillbechangedautomatically
单项选择题 Givenamethodthatmustensurethatitsparameterisnotnull:11.publicvoidsomeMethod(Objectvalue){12.//checkfornullvalue...20.System.out.println(value.getClass());21.}Whatinsertedatline12,istheappropriatewaytohandleanullvalue?()A.assertvalue==null;B.assertvalue!=null,"valueisnull";C.if(value==null){thrownewAssertionException("valueisnull");}D.if(value==null){thrownewIllegalArgumentException("valueisnull");}
单项选择题 YouaremaintainingyourdatabaseinOracle10g.Youwanttostoretheinformationaboutthebackupofthedatabaseinthecontrolfile.Youissuethefollowingstatement:SQL>ALTERSYSTEMSETCONTROL_FILE_RECORD_KEEP_TIME=400;Whatistheoutcomeofthisstatement?()A.Thestatementwillnotexecutesuccessfully.B.Thestatementwillexecutesuccessfully,andthebackupsmetadatawillbemaintainedinthecontrolfilefor400daysC.Thestatementwillexecutesuccessfully,andthebackupsmetadatawillbemaintainedintherecoverycatalogfor400days.D.Backupswillbedeletedfromthemediaafter400days.
单项选择题 Youhaveissuedthefollowingcommand:RMAN>CONFIGURERETENTIONPOLICYTORECOVERYWINDOWOF100DAYS;Whatwillbetheresultofusingtheabovecommand?()
单项选择题 YouwanttoadministeryourPRODdatabasefromaremotehostmachineusingaWeb-enabledinterface.WhichOracletoolwouldyouusetoaccomplishthistaskefficientlywithoutusingcommand-lineinterfaces?()
单项选择题 Usingthereportsserverhowwouldyouforcetheordersreportintheordersentryapplicationtoruneverysixhours?()
单项选择题 YouaremaintainingtheSALESdatabaseofacompany.YouhaveneverbackeduptheUSERStablespacethatiscurrentlyoffline.OnSunday,youissuedthefollowingcommands:CONFIGUREDEFAULTDEVICETYPETOsbt;CONFIGUREBACKUPOPTIMIZATIONON;CONFIGURERETENTIONPOLICYTOREDUNDANCY3;FromMondaytoSaturday,youperformedthefollowingactions:DayActionMondayBACKUPDATABASETuesdayBACKUPDATABASEWednesdayBACKUPDATABASEThursdayBACKUPDATABASEFridayBACKUPDATABASESaturdayBACKUPDATABASEHowmanytimeswillthebackupoftheUSERStablespacebeperformed?()
单项选择题 Youareusingflatfilesasthedatasourceforoneofyourdatawarehousingapplications.Tooptimizetheapplicationperformance,youplantomovethedatafromtheflatfilestoclusteredtablesinanOracledatabase.Whilemigratingthedata,youwanttohaveminimalimpactonthedatabaseperformanceandoptimizethedataloadoperation.WhichmethodwouldyouusetoloaddataintotheOracledatabase()A.Usetheexternaltablepopulation.B.UsetheOracleDataPumpexportandimportutility.C.UsetheconventionalpathdataloadoftheSQL*Loaderutility.D.UsetheINSERTINTO...SELECTcommandtoloadthedata.
单项选择题 Youarecreatingasalesdatatemplateandneedtoaddapicturetothemargin.Whatisthebestwaytoaddthismargin?()
单项选择题 AcustomerhasawebapplicationwithHTTPSessionsthatneedtobereplicatedtoabackupsitethatismorethan100milesawayfromtheprimarysite,connectedovertheInternet.WhichtypeofsessionreplicationinWebLogicisrecommended?()A.MANReplicationB.WANReplicationC.SynchronousReplicationD.AsynchronousReplicationE.DatabaseReplication
单项选择题 Howwouldyoudefaultthelayoutofaparameterform?()
单项选择题 WhichmethodintheThreadclassisusedtocreateandlaunchanewthreadofexecution?()
单项选择题 classA{publicintgetNumber(inta){returna+1;}}classBextendsA{publicintgetNumber(inta){returna+2}publicstaticvoidmain(Stringargs){Aa=newB();System.out.printIn(a.getNumber(0));}}Whatistheresult?()
单项选择题 publicclassXimplementsRunnable(privateintx;privateinty;publicstaticvoidmain(Stringargs)(Xthat=newX();(newThread(that)).start();(newThread(that)).start();)publicsynchronizedvoidrun()(for(;;)(x++;y++;System.out.printIn(x=+x+,y=+y);)))Whatistheresult?()A.Anerroratline11causescompilationtofail.B.Errorsatlines7and8causecompilationtofail.C.Theprogramprintspairsofvaluesforxandythatmightnotalwaysbethesameonthesameline(forexample,“x=2,y=1”)D.Theprogramprintspairsofvaluesforxandythatarealwaysthesameonthesameline(forexample,“x=1,y=1”.Inaddition,eachvalueappearstwice(forexample,“x=1,y=1”followedby“x=1,y=1”)E.Theprogramprintspairsofvaluesforxandythatarealwaysthesameonthesameline(forexample,“x=1,y=1”.Inaddition,eachvalueappearstwice(forexample,“x=1,y=1”followedby“x=2s,y=2”)
单项选择题 classAimplementsrunable(2.int&ensp
单项选择题 classA{publicbytegetNumber(){return1;}}classBextendsA{publicshortgetNumber(){return2;}publicstaticvoidmain(Stringargs){Bb=newB();System.out.printIn(b.getNumber())}}Whatistheresult?()
单项选择题 publicclassTest{publicstaticvoidmain(Stringargs){Stringfoo=args[1];Stringbar=args;Stringbaz=args;System.out.printIn(baz=”+baz);}}Andtheoutput:Baz=2Whichcommandlineinvocationwillproducetheoutput?()