You started a long transaction. Before committing， you executed a query on one of the tables currently being modified. You received the following error：  ORA-01555： snapshot too old  How would you prevent such an error in the future？（）

单项选择题When you try to open your database， you receive the following error：  ORA-00205： error in identifying control file   Where would you find the details required to resolve this error？（）

A.audit trail
B.alert log file
C.user trace file
D.online trace file
E.background trace file
F.operating system event viewer

单项选择题OneoftheusersinthePRODdatabase，Adams，complainsthathisupdateonthetable，TRANS，istakinganunusuallylongtimetocomplete.YoufindthatthetablegetslockedbyanotherdatabaseuserbeforeAdamsstartshistransactions，andyouareunabletocontacttheuserholdingthetablelock.AsAdamsisupdatingsomecrucialrowsinthetable，heshouldgetthehighestpriority.Whichmethodwouldyouusetoovercomethisproblem？（）

A.execute the command， ALTER SESSION KILL ..， to kill the blocking session
B.execute the DBMS_SESSION.KILL_SESSION procedure to kill the blocking session
C.execute the command， ALTER SYSTEM KILL SESSION ..， to kill the blocking session
D.execute the command， ALTER SESSION UNLOCK ..， to release the lock for the blocking session
E.execute the command， ALTER SYSTEM UNLOCK SESSION ..， to release the lock for the blocking session

单项选择题Youhavetwodatabases，FINDBandPAYDB，onsingleoperatingsystemandusingOptimalFlexiblearchitecture（OFA）.FINDBisfunctionalandiscurrentlybeingaccessedbytheusers.WhilestartinguptheinstanceforthePAYDBdatabaseyougetthefollowingerror：ORA-01081：cannotstart-alreadyrunningORACLE-shutitdownfirstWhichenvironmentalvariablewouldyousetbeforestartingupthePAYDBdatabasetoovercomethiserror？（）

A.ORA_PATH
B.ORACLE_SID
C.ORACLE_BASE
D.ORACLE_HOME
E.LD_LIBRARY_PATH

多项选择题While setting up the database for your production environment， you want to create a user with following requirements.   1.The objects created by the user must be stored in a tablespace， TBS1， if the  TABLESPACE option is not defined during the object creation.   2.The user should be able to use 10MB of space in the tablespace TBS1.   3.The user must change the password immediately after logging in for the first time.   Which three options of the CREATE USER command would you use to achieve this objective？（）

A.profile
B.account lock
C.account unlock
D.password expire
E.quota 10MB on TBS1
F.password never expire
G.default tablespace TBS1
H.quota unlimited on TBS1
I.temporary tablespace TEMP
J.temporary tablespace SYSTEM

单项选择题Inyourdatabase，theusersSYSandSYSTEMhavebeenassignedtheprofiles，ADMIN_PROF1andADMIN_PROF2，respectively.TherestofthedatabaseadministratorsareassignedtheprofileADMIN_PROF3.Youcreateaprofile，USER_PROF，andassignittotheapplicationuser，Adams.Afteraweekyourealizethattheprofileisnolongerrequiredandyoudecidetodropit.WhatwillAdam’sprofilebeaftertheUSER_PROFprofilehasbeendropped？（）

A.no profiles
B.the default profile
C.same as the profile of SYS user
D.same as the profile of SYSTEM user