Answer / sivamng_2003

The ADO IS purely used for Connected And Disconnected
Architectures like ACcess and MSSQL. Whereas RDO is fully
supports Oracel oriented connectivity.

Answer / dayananda

In ADO, we can call using common objects.
In RDO, we can call using RDO querry objects.

Answer / prabhu

The System.Data namespace consists mostly of the classes
that constitute the ADO.NET architecture. The ADO.NET
architecture enables you to build components that
efficiently manage data from multiple data sources. In a
disconnected scenario (such as the Internet), ADO.NET
provides the tools to request, update, and reconcile data
in multiple tier systems. The ADO.NET architecture is also
implemented in client applications, such as Windows Forms,
or HTML pages created by ASP.NET.

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