单项选择题
What is the implication of this command?（）
A.The command produces an error because the retention time cannot be reduced.
B.All historical data is retained but the subsequent flashback data archives are maintained for only three years.
C.All historical data is purged and the new flashback data archives are maintained for three years.
D.All historical data older than three years is purged from the flashback archive FLA1.
相关考题
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单项选择题
Whileperformingthebackupoftheflashrecoveryarea,younoticethatoneofthearchivedredologfilesismissing.Youhavemultipledestinationsforarchivedredologfiles.Whatimplicationsdoesithaveonthebackupoftheflashrecoveryarea?（）
A.The backup fails because one of the archived redo log files is missing.
B.The backup succeeds but it would be without the missing archived log.
C.During backup, you are prompted for the alternative destination for the missing archived redo log file.
D.The backup succeeds because it fails over to one of the alternative archived redo log destinations. -
单项选择题
WhichisthesourceusedbyAutomaticSQLTuningthatrunsaspartoftheAUTOTASKframework?（）
A.SQL statements that are part of the AWR baseline only
B.SQL statements based on the AWR top SQL identification
C.SQL statements that are part of the available SQL Tuning Set (STS) only
D.SQL statements that are available in the cursor cache and executed by a user other than SYS -
多项选择题
WhataretheadvantagesofvariableextentsizesupportforlargeASMfiles?（）
A.It improves resync operations when the disk comes online after being taken offline for maintenance purposes.
B.It improves performance in the extended cluster configuration by reading from a local copy of an extent.
C.Fewer extent pointers are needed to describe the file and less memory is required to manage the extent maps in the shared pool.
D.This feature enables faster file opens because of the reduction in the amount of memory that is required to store file extents.
