Final answer:
Business rules typically run on the server side to ensure data integrity, consistency, and security, but some client-side rules may also be used for immediate user feedback.
Step-by-step explanation:
Business rules are typically a set of operations, definitions, and constraints that are applied to a database. Whether a business rule runs on the client side or the server side can depend on the specific implementation and the context in which they are utilized. However, business rules are generally expected to be executed on the server side to ensure data integrity, consistency across users, and to secure business logic from client-side vulnerabilities. Server-side execution also allows for the rules to remain hidden from the client, protecting the business logic from manipulation or reverse engineering.
Some systems may employ client-side rules for improving user experience by providing immediate feedback, but these should not replace server-side checks. It is crucial to have a secure server-side validation as anyone with enough technical knowledge can bypass client-side checks.