Which two are true about instance recovery for a database that is open in read write mode? (Choose two.)
A. It is guaranteed to complete within fast_start_mttr_target number of seconds.
B. No users can log on until instance recovery has completed.
C. Only the CURRENT REDO log group is required to perform instance recovery.
D. It is always performed when opening a database.
E. It always occurs during instance startup performed immediately after a SHUTDOWN ABORT.
F. The database opens after the roll forward phase of instance recovery has completed.
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