SQL Server Interview Topic 19: Stored Procedure Practical Questions

This topic checks whether you can discuss stored procedures like a developer who has used them in APIs and reports.

🎯 Interview Goal

You should be able to explain parameters, transactions, error handling, and stored procedure usage in backend projects.

Q130. What are parameters in a stored procedure?

Quick interview answer:

Parameters are input values passed to a stored procedure. For example, @ClassId can be passed to return students from one class. Parameters make stored procedures reusable.

Study in detail: Stored Procedures and Functions - This lesson explains procedure inputs.

Q131. Can a stored procedure return data?

Quick interview answer:

Yes. A stored procedure can return result sets using SELECT, return values, or output parameters. APIs commonly read result sets from stored procedures.

Study in detail: Stored Procedures and Functions - This article explains procedure outputs.

Q132. How do you handle errors in stored procedures?

Quick interview answer:

Use structured error handling such as TRY...CATCH. If the procedure changes data, combine error handling with transactions so failed operations can be rolled back safely.

Study in detail: Transactions and Concurrency - This lesson explains safe changes.

Q133. Should business logic be inside stored procedures?

Quick interview answer:

Some database-related logic can be inside stored procedures, especially reports or data-heavy operations. But application workflow and UI-specific rules usually belong in the application layer. The best answer depends on project standards.

Study in detail: Advanced Patterns - This article explains where logic can live.

Q134. How do APIs call stored procedures?

Quick interview answer:

An API creates a database command, passes parameters, executes the stored procedure, and reads the result. Parameters must be used safely instead of joining user input into command text.

Study in detail: API Integration - This lesson connects procedures with backend APIs.

💡 Interview Tip

For stored procedure questions, mention reusability, parameters, security, and maintainability.