I'm sorry but you are posting multiple times with different questions all over these forums, without explaining why you need to know.

If you are preparing some school/college project or homework then we don't help. The whole idea of that is to find out for yourself.

Before I lock, one tip. Google the question you are asking. For example I found plenty of hits on Active Directory Tombstone Lifetime when I Googled Tombstone period in active directory.

Any other posts I find I will lock without further comment. If you believe I have erred, send me a message through the "Report Offensive Post" alert option.

Good luck.

Mark