Go back to 642-165 - Unified Communications Contact Center Express Implementation(UCCX)

Question :-

what is the purpose of setting the flush input buffer field of the menu step to true?
to release memory held by the prompt variable
to clear previously entered input before the menu step executes
to specity if the step can be interrupted by an agent who becomes available
to prevent the caller from entering a menu choice before the prompt has played

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