You have performed the first step in placing your database into ARCHIVELOG mode. The second step is deciding whether the online redo log files are to be archived automatically or manually. 
Which action should you take to enable archiving at instance startup？（）

单项选择题When performing an incomplete recovery of the whole database， what must be true about the data files that are restored？（）

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

多项选择题What is true regarding the role Oracle Net provides in a client server connection with no middle tier？（）

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 table space is stored. The database is currently open and you need to recover the data file. You will restore the data file to DISK2.  What is the correct sequence RMAN commands to restore and recover the data file？（）

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

多项选择题WhichtwostatementsregardingthecontrolfileandRecoverManageraretrue？（）

A.The control file can grow in size.
B.The control file can store RMAN scripts.
C.CONTROL_FILE_RECORD_KEEP_TIME determines retention time for RMAN records.
D.The RMAN catalog can exist solely in the control file of the target database.

单项选择题You want to drop the TBS1 tablespace from your database.  You also want to delete the corresponding data files automatically， and not have to do it manually.  What should you do？（）

A.Use the DROP DATAFILE command.
B.Use the DROP TABLESPACE command.
C.Ensure that all database files are Oracle Managed Files before using the DROP TABLESPACE command.
D.Ensure that the DB_FILE_CREATE_DEST initialization parameter is set before using the DROP TABLESPACE command.