Is there any process that mcafee virus scan use to check the scaned file[the file that was already scaned ] for making sure not to do repetition scan
Yes, there is a clean file scan cache that resides in memory.
It's smart enough to know when an item has been scanned, and what settings it was scanned with, so if we see the file again we'll know if we need to scan it or not.
Is there any document for this caz customer need an evidence
Have a look at What’s New: