NRO Fixed Deposits

Why should I opt for NRO fixed deposits?
In what currency can I maintain my DBS Treasures NRO fixed deposit account?
How often will I receive interest on my NRO Fixed Deposit?
Can I opt for premature withdrawal on my NRO Fixed Deposit?
What happens if I forget my FD maturity date?
Can I open the FD jointly with another individual and can I assign a nominee for my fixed deposit?
Is NRO FD interest taxable?