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You want to set the following initialization parameters for your database instance: LOG_ARCHIVE_DEST_1 = 'LOCATION=/disk1/arch' LOG_ARCHIVE_DEST_2 = 'LOCATION=/disk2/arch' LOG_ARCHIVE_DEST_3 = 'LOACTION=/disk3/arch' LOG_ARCHIVE_DEST_4 = 'LOCATION=/disk4/arch MANDATORY' Identify the statement that correctly describes this setting.
Correct Answer: D
Explanation/Reference: Explanation: MANDATORY Specifies that filled online log files must be successfully archived to the destination before they can be reused. If MANDATORY is not specified, then, by default, the destination is considered to be optional. At least one destination must succeed, even if all destinations are optional. If archiving to an optional destination fails, the online redo log file is still available for reuse and may be overwritten eventually. However, if the archival operation of a mandatory destination fails, online redo log files cannot be overwritten.