A.AB.BC.CD.DWhat is true regarding a transaction execut……

多项选择题YoucanuseOracleFlashbacktolookatpastactivityinyourdatabase.WhataretwoothercharacteristicsofOracleFlashback？（）

A.Oracle Flashback uses undo information to construct consistent data. 
B.You can use a cursor opened while using an Oracle Flashback image to perform DML once you deactivate Oracle Flashback in your session. 
C.You can only use Oracle Flashback view of the data if the required records are still in the online redo log files. 
D.Oracle Flashback lists the DML that was executed during the period you identify when initiating your session. 

单项选择题Whatistrueaboutversion-enabledtables？（）

A.The unit of versioning is the schema.
B.It is possible to version enable a table pertaining to SYS.
C.There are as many segments as versions for the same base table.
D.It is possible to create workspaces if there is no version-enabled table in the database.

多项选择题Which three table transformations can be done using online redefinition of tables？（）

A.A
B.B
C.C
D.D
E.E

单项选择题You have just run this syntax to start the listener from the Listener Control utility：   LSNRCTL>START   Starting  mstgelai oracle bin tnslsnr： please wait…  System parameter file is  u01 oracle network admin listener.ora Log messages written to  u01 oracle network log listener.log  Listening on： （DESCRIPTION=（ADDRESS=（PROTOCOL=tcp）（HOST=stc-sun01-server）（PORT=1521））） Connecting to…  The command completed successfully   What is the name of the Listener you started？（）

A.TNSLSNR
B.LISTENER
C.LOCAL_LISTENER
D.DEFAULT_LSRN

单项选择题In this scenario， assume that you archive logs 101 to 104 to two archiving destinations，  log1 and  log2. The control file contains archived log records as follows：   Sequence Filename  101  log1 log_1_101.arc  101  log2 log_1_101.arc  102  log1 log_1_102.arc  102  log2 log_1_102.arc  103  log1 log_1_103.arc  103  log2 log_1_103.arc  104  log1 log_1_104.arc  104  log2 log_1_104.arc   You accidentally delete logs 102 and 104 from log 1. You run this command：   BACKUP ARCHIVELOG FROM SEQUENCE 101 UNTIL SEQUENCE 105；   What happens？（）

A.A
B.B
C.C
D.D