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Examine the following commands and their output:View the exhibit and examine the Flashback Version Query that was executed after the preceding commands.What could be the possible cause for the query not displaying any row?（）A. Flashback logging is not ena

题目

Examine the following commands and their output:View the exhibit and examine the Flashback Version Query that was executed after the preceding commands.What could be the possible cause for the query not displaying any row?（）

A. Flashback logging is not enabled for the database.

B. The changes made to the table are not committed.

C. Supplemental logging is not enabled for the database.

D. The database is not configured in ARCHIVELOG mode.

参考答案和解析
参考答案：B
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相似问题和答案

第1题：

You’re going to have a quiz ( )by another two in the ( )month.

A. followed,followed

B. followed,following

C. following,followed

D. following,following


参考答案：B

第2题：

Youarerequiredtoflashbackyourdatabase.Youwanttofindtheamountofflashbackdatageneratedsincethedatabasewasopened.Whichtaskwillyouperformtoobtaintherequiredinformation?()

A.QuerytheV$FLASHBACK_DATABASE_LOGview.

B.QuerytheV$FLASHBACK_DATABASE_STATview.

C.CheckthevalueoftheDB_FLASHBACK_RETENTION_TARGETinitializationparameter.

D.QuerytheV$RECOVERY_FILE_DESTview.


参考答案：B

第3题：

We will do our best to ( ) shipment to meet your requirements in time.

A.expect

B.expedite

C.exercise

D.examine


参考答案：B

第4题：

Nothing in these Rules shall ______ any vessel，or the owner，master or crew thereof，from the consequences of any precaution which may be required by the ordinary practice of seaman，or by the special circumstances of the case．

A.exonerate

B.exhaust

C.exercise

D.examine


正确答案：A

第5题：

After __________ (examine) the lady, the doctor suggested that his back was badly hurt in the accident.


参考答案：being examined

第6题：

ThesearethedetailsaboutV$FLASHBACK_DATABASE_STAT：SQL>DESCV$FLASHBACK_DATABASE_STATNameNull？Type-----------------------------------BEGIN_TIMEDATEEND_TIMEDATEFLASHBACK_DATANUMBERDB_DATANUMBERREDO_DATANUMBERESTIMATED_FLASHBACK_SIZENUMBERWhichtwostatementsregardingtheV$FLASHBACK_DATABASE_STATviewaretrue？（）

A.BEGIN_TIMEisthetimeatwhichFlashbackloggingisenabled.

B.END_TIMEisthetimeatwhichthequeryisexecutedontheview.

C.REDO_DATAisthenumberofbytesofredodatawrittenduringtheinterval.

D.Thisviewcontainsinformationaboutflashbackdatapertainingtothelast24hours.

E.FLASHBACK_DATAistheamountofflashbackdatageneratedsincethedatabasewasopened.


参考答案：C, D

第7题：

Youexecutedthefollowingqueryinyourdatabase:SELECToldest_flashback_scn,oldest_flashback_timeFROMV$FLASHBACK_DATABASE_LOG;Whatwouldyoudeterminefromthe output?()

A.Thetimewhenthelastflashbackoperationinyourdatabasewasperformed.

B.Thetimewhenthefirstflashbackoperationinyourdatabasewasperformed.

C.AlistofflashbackoperationsperformedinyourdatabaseusingSCNandtime.

D.Theapproximatetimeandthelowestsystemchangenumber（SCN）towhichyoucanflashbackyourdatabase.


参考答案：D

第8题：

I think the door is locked. But I'll go and ().

A、check

B、examine


参考答案：A

第9题：

检查

A.expect

B.except

C.excuse

D.examine


正确答案：D

第10题：

He rolled up his trouer leg to exhibit his wounded knee.

A:spread
B:open
C:show
D:examine

答案：C
解析：
本句意思：他卷起他的裤腿来显露受伤的膝盖。exhibit展示，显示。spread伸开，展开；open打开；show展示，出示；examine检查。

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