单项选择题

Which statement is true regarding this setting?（）

A.It drops the connection after the specified number of login attempts fail for any user.
B.It is enforced only if the password profile is enabled for the user.
C.It locks the user account after the specified number of attempts.
D.It drops the connection after the specified number of login attempts fail only for users who have the SYSDBA privilege.

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Because of a power outage， instance failure has occurred. From what point in the redo log does recovery begin and where does it end？（）

A.current redo log and inactive redo log
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C.C
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