TheFORCE wrote: »
When it comes to retention policies, the policy alone is not enough. You actually need to do periodical tests in order to validate that whatever you have backed up can actually be brought up again and become available.
I saw you posting other questions also but you are not providing your answer or where you are getting confused. A lot of these answers come from understanding the material and you need to look at the books you are studying from for those specific areas to get more information. Reading the material once and then doing questions isn't enough.