OracleCommand: Used specifically for Oracle databases.?

Short answer: Example: OracleCommand command = new OracleCommand("SELECT * FROM Customers", connection);

Example code

Example: OracleCommand command = new OracleCommand("SELECT * FROM Customers", connection);

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.