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What is a DataAdapter?

Q: What is a DataAdapter?

Short answer: A DataAdapter serves as a bridge between a DataSet/DataTable and the database. It is used to fill a DataSet with data and to update changes made in the DataSet back to the database. Example code SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM Customers", connection); DataSet dataset = new DataSet(); adapter.Fill(dataset, "Customers"); // Fills DataSet with data from the Customers table 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 Define — one clear sentence (the short answer above). Example — relate it to a project like ShopNest or your real work. Trade-off — when you would not use it.

Short answer: A DataAdapter serves as a bridge between a DataSet/DataTable and the database. It is used to fill a DataSet with data and to update changes made in the DataSet back to the database.

Example code

SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM Customers", connection); DataSet dataset = new DataSet(); adapter.Fill(dataset, "Customers"); // Fills DataSet with data from the Customers table

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

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

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