Explain the difference between ADO.NET and traditional ADO.

Short answer: ADO (ActiveX Data Objects): ADO is a COM-based technology that works with databases in a connected environment (requiring an open connection to the database for the duration of data retrieval).

Explain a bit more

ADO.NET: ADO.NET, in contrast, focuses on disconnected data access. It allows you to retrieve data, work on it offline (disconnected), and then send any changes back to the database. Key Differences: ADO relies on active connections to the database, whereas ADO.NET uses a disconnected model (DataSet, DataTable). ADO.NET provides better support for XML, scalability, and performance in multi-tier applications.

Real-world example (ShopNest)

ShopNest’s reporting job still uses ADO.NET for a heavy SQL query where raw performance and stored procedures matter more than EF convenience.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.