Identifying type of encoding algorithms and decrypt

I was just curious on how to identify the type of encoding/hash used and decrypt it.
For example we have “3AqxxqQkWV” this how to identify and decrypt this
Thank You for your help!

Don’t you have any hints?

It’s not working like that XD.

If you have just have only 10 letters to help you understand what encoding is,then it’s not possible most of the times…
This may be Playfair, Bifid and some other possible ciphers.