What is ADO.NET?

Short answer: ADO.NET (Active Data Objects .NET) is a data access technology in the .NET framework that enables applications to interact with databases and other data sources.

Explain a bit more

It provides a set of classes for connecting to databases, retrieving data, manipulating data, and updating data. ADO.NET is designed for disconnected data access, meaning that data can be retrieved, modified, and worked with without maintaining an ongoing connection to the database. Real-Time Example: In a C# application, ADO.NET is used to retrieve a list of products from a database and display it in a UI like a GridView. The data is fetched from the database, stored in a DataSet or DataTable, and then bound to the UI controls.

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.