WhichthreestatementsaretrueregardingthelogicalstructureoftheOracledatabase?()
A. Eachsegmentcontainsoneormoreextents.
B. Multipletablespacescansharesingledatafile.
C. AdatablockisthesmallestunitofI/Ofordatafiles.
D. Itispossibletohavetablespacesofdifferentblocksizesinadatabase.
EachdatablockinthedatabasealwayscorrespondstooneOSblock.
查看答案
Yourdatabaseisupandrunningandoneofyourthreecontrolfilesisaccidentallyerased.YoustartRMANandrunthefollowingcommand:RESTORECONTROLFILEFROMAUTOBACKUP;Whichofthefollowingstatementsistrue?()
A. Thecommandrestoresonlythemissingcontrolfile.
B. Thecommandrestoresallthecontrolfiles.
C. Thecommandfailsbecausethedatabaseisrunning.
D. Thisisthecorrectwaytoaddressthisproblem.
E. Thisisnotthecorrectwaytoaddressthisproblem.
下列观点中,违反唯物辩证法用联系的观点看问题的现象是()
A. 普高生以后要考大学,所以,他们必须好好学习
B. 对职高生来说,只要学好专业技能课就行了,文化课学不学对以后就业影响不大
C. 职高生不重视文化课的学习,会影响对专业技能知识的掌握和运用
D. 职高生毕业后面临的就业压力并不小于普高生的高考压力,也应该好好学习
Whichcommandisusedtobeginatablespacepoint-in-timerecovery?()
A. Restoretablespace
B. Recovertablespace
C. Tablespacerecover
D. Recovertotime
E. recoverdatafile
下列哪一些交通工具属于新事物()
A. 飞机
B. 高铁
C. 动车
D. 轻轨
E. 自行车