多项选择题

You can use Oracle Flashback to look at past activity in your database. What are two other characteristics of Oracle Flashback？（）

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.

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热门试题

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

单项选择题You discover that a disk failure occurred on DISK3 where the data file belonging to the USER_DATA tablespace is stored. The database is currently open and you need to recover the data file. You will restore the data file from the backup on DISK5 to DISK2. What is the correct sequence of commands to restore and recover the data file？（）

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