Explain the use of the Fill method of the DataAdapter. The Fill() method of the DataAdapter is used to populate a DataSet or DataTable with data from the database. It executes the SELECT query defined in the DataAdapter and fills the specified DataSet or DataTable with the results. Example: SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM Customers", connection); DataSet dataset = new DataSet();

Short answer: dapter.Fill(dataset, "Customers"); // Fills the DataSet with data from the "Customers" table dapter.Fill(dataset, "Customers"); // Fills the DataSet with data from the "Customers" table dapter.Fill(dataset, "Customers"); // Fills the DataSet with data from the "Customers" table dapter.Fill(dataset, "Customers"); // Fills the DataSet with data from the…

Real-world example (ShopNest)

ShopNest opens a SqlConnection only for the query, then disposes it (using). Connection pooling reuses physical connections automatically.

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.