单项选择题

Which of the following commands cannot use the functionality assosciated with theNLS_DATE_FORMAT variable？（）

A.RESTORE
B.RECOVER
C.REPORT
D.BACKUP

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单项选择题

What is the maximum number of ARCn processes that can be defined using the initialization parameter LOG_ARCHIVE_MAX_PROCESSES？（）

A.1
B.5
C.10
D.15
E.Depends on system memory resources

单项选择题

Which background process is responsible for writing the dirty buffers from the write list to the data files during a checkpoint？（）

A.CKPT
B.SMON
C.LGWR
D.DBWn
E.ARCn

单项选择题

Which of the following statement is incorrect regarding RMAN？（）

A.It detects corrupt blocks.
B.It performs only offline database backups.
C.It omits empty blocks during backups.
D.It performs tablespace point-in-time recovery （TSPITR）.