The operating system file cratab in the Linux platform gets updated whenever you create a new database on the same host machine. What kind of information is stored is stored in this file？（）

单项选择题YouworkasadatabaseadministratorforSupportcenter.cn.InyourOracledatabase10ginstallationyouhavesetORACLE_BASEto u01 app oracle.Whichobjectivewillbeachievedbythissetting？（）

A.The Oracle kernel will be placed in this location.
B.The Oracle software will be placed in this location.
C.The server parameter file （SPFILE） will be placed in this location.
D.The database files will be placed in this location， if not specified explicitly.
E.The location will be considered for the base of Oracle Managed Files （OMF）.
F.The location will be considered for the base of Optimal Flexible Architecture （OFA）.

单项选择题YouworkasadatabaseadministratorforSupportcenter.cn.YoufindthatuserswithDBAroleareusingmoreCPUresourcesthanwhatisallocatedintheirprofiles.Whichactionwouldyoutaketoensurethatresourceslimitsareimposedontheseusers？（）

A.Assign the DEFAULT profile to the users
B.Set the RESOURCE_LIMIT parameter to TRUE in the parameter file
C.Create a new profile with CPU restrictions and assign it to the users
D.Specify the users as members of the DEFAULT_CONSUMER_GROUP
E.Revoke the DBA role and grant CONNECT and RESOURCE role to the users

单项选择题YourSupportcenter.cndatabaseisinARCHIVELOGmode.ThedatafilethatbelongstotheSYSTEMtablespacehasbecomecorrupted.Uptowhatpointcanyourecoverthedatabase？（）

A.Until last commit
B.Until the time you perform recovery
C.Until the time the date file got corrupted
D.Until the point where the last transaction begun
E.You cannot recover the SYSTEMtablespaceand must re-create the database.

单项选择题YouworkasadatabaseadministratorforSupportcenter.cn.Inyourproductiondatabase，thesizeofDatabaseBufferCacheneedstobeincreasedimmediatelyforthecurrentaswellasfutureinstancesofthedatabase.TheOracleinstancehasbeenconfiguredtoaccommodateanychangesinthesizeofthememorystructures.Atthisisproductiondatabase，youwanttoaccomplishthistaskwithnoimpactontheuser’sconnections.Whichactivitymustyouhavecompletedbeforeaccomplishingthistask？（）

A.You must have started the database instance in restricted mode.
B.You must have started the database instance inNORMALmode.
C.You must have started the database instance with server parameter file.
D.You must have started the database instance but must not have mounted.
E.You must have started the database instance but must not have opened.

多项选择题You work as a database administrator for Supportcenter.cn. You decided to manage client and server connections using Local Naming method in Supportcenter.cn. When you try to connect to the database you get the following error： ERROR：   ORA-12154：TNS：couldnot resolve service name   Which network configuration files would you look into to resolve this error？（）

A.snmp.ora
B.names.ora
C.spfile.ora
D.sqlnet.ora
E.listener.ora
F.tnsnames.ora