Overview
Business Rules are server-side scripts that execute when database records are displayed, inserted, updated, deleted, or queried. They are one of the most powerful automation tools in ServiceNow, allowing developers to enforce data policies, automate workflows, and implement complex business logic.
Why It Matters for the Exam
Business Rules account for 15% of the CAD exam. Questions focus on understanding the different types of business rules (before, after, async, display), when each type executes, and how to use the current and previous objects effectively.
Key Concepts to Master
💡 Exam Tips & Strategy
Remember that 'before' business rules can modify the current record without an explicit update() call, while 'after' rules require update() for changes to related records. Know that 'display' business rules run when a form loads and can set scratchpad values for client scripts.