What is the purpose of Command object in ADO.NET?

Short answer: The Command object is used to execute SQL queries or stored procedures against a database. It encapsulates the SQL statement or stored procedure and returns results.

Example code

SqlCommand command = new SqlCommand("SELECT * FROM Customers", connection); SqlDataReader reader = command.ExecuteReader();

Real-world example (ShopNest)

Always pass order ids with parameters: cmd.Parameters.AddWithValue("@id", orderId). Never concatenate user input into SQL.

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.