A. They consist of one or more Scheduler programs.
B. They are used to implement dependency scheduling.
C. They are used to implement time-based scheduling.
D.They are used to implement event-based scheduling.
E.None of the above.
第1题
Yourtnsnames.orafilehasthefollowingentryfortheservicealiasORCL:ORCL=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.156.24.216)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=orcl.oracle.com)))TheTNSPINGcommandexecutessuccessfullywhentestedwithORCLbutyouarenotabletoconnecttothedatabaseinstancewiththefollowingcommand:SQL>CONNECTscott/tiger@orclWhatcouldbethereasonforthis?()
A.Thelistenerisnotrunningattheserver.
B.TheTNS_ADMINenvironmentalvariableissettoawrongvalue.
C.Theorcl.oracle.comdatabaseserviceisnotregisteredwiththelistener.
D.TheDEFAULT_DOMAINparameterissettoawrongvalueintheSQLNET.ORAfile.
第2题
A.Thedatabasemustbeinread-writemode.
B.Thedatabasemusthavenoexternalfiles.
C.Thedatabasemustopeninread-onlymode.
D.Thedatabasemustbemountedbutnotopened.
第3题
UserAexecutesthefollowingcommandtodropalargetableinyourdatabase:SQL>DROPTABLEtrans;Whilethedroptableoperationisinprogress,userBexecutesthefollowingcommandonthesametable:SQL>DELETEFROMtransWHEREtr_type=’SL’;WhichstatementistrueregardingtheDELETEcommand()
A.Itfailswitha"ResourceBusy"error.
B.ItdeletestherowssuccessfullybecausethetableislockedinSHAREmode.
C.ItfailstodeletetherecordsbecausethetableislockedinEXCLUSIVEmode.
D.ItdeletestherowssuccessfullybecausethetableislockedinSHAREROWEXCLUSIVEmode.
第4题
A. WINDOW_PRIORITY
B. PRIORITY
C. PRIORITY_LEVEL
D. WINDOW_PRIORITY_LEVEL
E. OVERLAP_RULE
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