What is the purpose of CommandTimeout property in ADO.NET?

Short answer: The CommandTimeout property specifies the amount of time (in seconds) before a command is considered to have timed out. If the command execution takes longer than the specified time, an error is raised. Example: SqlCommand command = new SqlCommand("SELECT * FROM Customers", connection); command.CommandTimeout = 30; // Timeout after 30 seconds

Example code

Intermediate ADO.NET Questions

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.