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【单选题】
微分先行算法对()处理A.
r(t)
B.
e(t)
C.
y(t)
D.
u(t)
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【单选题】You disabled the Flashback Database feature by using the following command： SQL> ALTER DATABASE FLASHBACK OFF; What would be the effect of this command on the existing flashback logs？（）
A.
Flashback logs are not deleted.
B.
Flashback logs are deleted automatically.
C.
Flashback logs are deleted only if you are using Recovery Manager （RMAN）.
D.
Flashback logs are deleted only if you are using Oracle Managed Files （OMF）.
E.
Flashback logs are deleted only if you are using Automatic Storage Management （ASM）.
【单选题】Note the output of the following query； SQL> SELECT flashback_archieve_name， status FROM dba_flashback_archieve； FLASHBACK_ARCHIEVE_NAME STATUS FLA1 You executed the following command to enable Fl...
A.
The table uses the default Flashback Data Archive.
B.
The Flashback Data Archive Is created In the SYSAUX tablespace.
C.
The Flashback Data Archive is created in the same tablespace where the tables are stored.
D.
The command generates an error because no flashback Data Archive name is specified and there is no default Flashback Data Achieve.
【单选题】A corporation is a busine s s o r ganization that is f o rmed to act as a single person and is l e g a lly ______ with particular rights and duties.
A.
c reated
B.
demanded
C.
endowed
D.
traced
【多选题】《国家突发公共事件总体应急预案》明确了各类突发公共事件分级分类和预案框架体系，规定了应对特别重大突发公共事件的组织体系、工作机制等内容。关于《国家突发公共事件总体应急预案》的有关内容，下列说法中，正确的是( )。
A.
国务院是突发公共事件应急管理工作的最高行政领导机构
B.
突发公共事件分为：自然灾害、安全生产事故、公共卫生事故、环境污染事故4类
C.
突发公共事件分为：特别重大、重大、较大、和一般四个等级
D.
突发公共事件的等级是按照其性质、严重程度、可控性和影响范围等因素划分的
E.
重大突发公共事件发生后，省级人民政府要在4小时内向国务院报告
【单选题】is a corporation ’ s own stock that has been issued and subsequently reacquired by purchase.
A.
Outstanding stock
B.
Treasury Stock
C.
Common stock
D.
Preferred stock
【单选题】You executed the following query in your database： SELECT oldest_flashback_scn， oldest_flashback_time FROM V$FLASHBACK_DATABASE_LOG； What would you determine from the output？（）
A.
The time when the last flashback operation in your database was performed.
B.
The time when the first flashback operation in your database was performed.
C.
A list of flashback operations performed in your database using SCN and time.
D.
The approximate time and the lowest system change number （SCN） to which you can flash back your database.
【多选题】Which three statements are true about Flashback Database?（）
A.
Flashback logs are written sequentially, and are archived.
B.
Flashback Database uses a restored control file to recover a database.
C.
The Oracle database automatically creates, deletes, and resides flashback logs in the Fast RecoveryArea.
D.
Flashback Database can recover a database to the state that it was in before a reset logs operation.
E.
Flashback Database can recover a data file that was dropped during the span of time of the flashback.
F.
Flashback logs are used to restore to the blocks' before images, and then the redo data may be used to roll forward to the desired flashback time.
【单选题】You disabled the Flashback Database feature by using the following command： SQL> ALTER DATABASE FLASHBACK OFF； What would be the effect of this command on the existing flashback logs？（）
A.
Flashback logs are not deleted.
B.
Flashback logs are deleted automatically.
C.
Flashback logs are deleted only if you are using Recovery Manager （RMAN）
D.
Flashback logs are deleted only if you are using Oracle Manager Files （OFM）
E.
Flashback logs are deleted only if you are using Automatic Storage Management （ASM）
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