You explicitly specified the tablespace usage threshold values while creating a tablespace. You need to revert to the database-wide default tablespace usage threshold values for the tablespace. Which PL/SQL package would you use?（）

多项选择题Youneedtoensurethatthedatabaseusersshouldbeabletousethevariousflashbackqueryfeaturesinordertogobackintimebyfourhours.Whatwouldyoudotoachievethis?（）

A.set SQL_TRACE=True 
B.set UNDO_RETENTION=14400 
C.set FAST_START_MTTR_TARGET=240 
D.set LOG_CHECKPOINT_INTERVAL=240 
E.set DB_FLASHBACK_RETENTION_TARGET=14400 
F.set the RETENTION GUARANTEE clause for the undo tablespace

多项选择题WhichtwostatementsregardingthePolicyFrameworkinEnterpriseManager(EM)arecorrect?（）

A.Policy violations are prioritized as High, Medium, or Informational by category 
B.Policies can be disabled completely, or flagged as ignored, for the specified target 
C.Policies can be flagged as ignored, but never completely disabled, for the specified target
D.Policy violations must be corrected, otherwise the database will shut down until corrective action occurs

单项选择题Youhavethreeproductiondatabases,HRDB,FINDB,andORGDB,thatusethesameASMinstance.Attheendoftheday,youexecutethefollowingcommandontheASMinstancetoshutdown:SQL>shutdownimmediate;Whatistheresultofexecutingthiscommand?（）

A.All the instances, including the ASM instance, are shut down in the ABORT mode
B.The ASM instance is shut down, but the other instances are still running 
C.The ASM instance is still functional, but the other instances are shut down 
D.All the instances, including the ASM instance, are shut down in the IMMEDIATE mode. 
E.HRDB, FINDB, and ORGDB instances are shut down in the ABORT mode and the ASM instance is shut down in the IMMEDIATE mode 
F.HRDB, FINDB, and ORGDB instances are shut down in the NORMAL mode and the ASM instance is shut down in the IMMEDIATE mode

多项选择题WhichtwostatementsregardingtheFLASHBACK_TRANSACTION_QUERYviewarecorrect?（）

A.You can find information about only active transactions from the view
B.You can find information about read only transactions from the view
C.You require the SELECT ANY TRANSACTION system privilege to access the view 
D.You can find information about both active and committed transactions from the view 
E.You require the SELECT ON FLASHBACK_TRANSACTION_QUERY object privilege to access the view

单项选择题Youwanttoperformthedatabasebackupwhenuseractivityonyoursystemislow,suchasbetween12:00a.m.and2:00am.Whichcommandterminateswithanerrorifthebackupisnotcompleteattheendofthespecifiedduration?（）

A.RMAN> BACKUP DURATION 2:00 MINIMIZE LOAD DATABASE
B.RMAN> BACKUP DURATION 2:00 PARTIAL FILESPERSET 1 DATABASE
C.RMAN> BACKUP DURATION 2:00 PARTIAL MINIMIZE TIME DATABASE 
D.RMAN> BACKUP AS COPY DURATION 2:00 PARTIAL MINIMIZE LOAD DATABASE