Which background process reads the redo log buffer and writes it to a file？（）

单项选择题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？（）

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

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.