Explain the role of the Connection object in ADO.NET.

Short answer: The Connection object represents a connection to a specific data source (e.g., SQL Server). It is used to establish and manage the connection to the database, execute queries, and close the connection when done.

Example code

SqlConnection connection = new SqlConnection(connectionString); connection.Open();

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.