1、.Which two are true about the Archive (ARCn) processes?
A) They automatically delete obsolete archive logs to make space for new archive logs.
B) They are used during Instance recovery.
C) They arc...
2、Which two are true about Optimizer Statistics?
A) They do not persist across Instance restarts.
B) They are automatically updated when DDL statements execute.
C) They are gathered by the Manageabil...