A. If the DNS zone is Active Directory (AD)-integrated, meaning the DNS zone information is stored in AD, then an RODC's DNS information is read-only, like the content of AD.

If the DNS receives a write attempt, the DNS server will refer the client to a writable DNS server and then try and replicate from that writable DNS server after 30 seconds.

Related Reading:

Check out hundreds more useful Q&As like this in John Savill's FAQ for Windows. Also, watch instructional videos made by John at ITTV.net.