What is the difference between UI Policy and UI Action?

UI Policies and UI Actions are both part of the ServiceNow user interface customization but serve

different purposes.

UI Policy:

Used to dynamically change form field behaviors based on specific conditions.

Can make fields read-only, mandatory, or hidden without requiring scripts.

Runs on the client-side (browser) to improve performance and responsiveness.

Example:

If the Category is Hardware, the Serial Number field becomes mandatory.

UI Action:

Used to create buttons, links, and context menu actions.

Can execute scripts to perform specific actions when clicked.

Runs on the server-side or client-side depending on configuration.

Example:

A "Save" button that becomes visible only to users with a specific role.

Why Option A is Incorrect?

UI Policy (not UI Action) is responsible for making fields read-only, mandatory, or hidden.

UI Action (not UI Policy) is responsible for making a Save button visible for specific users.

Reference from Certified System Administrator (CSA) Documentation:

ServiceNow Docs: UI Policy Overview

https://docs.servicenow.com/en-US/bundle/utah-platform-administration/page/administer/formadministration/concept/c_UIPolicies.html

ServiceNow Docs: UI Action Overview

https://docs.servicenow.com/en-US/bundle/utah-platform-administration/page/administer/formadministration/concept/c_UIActions.html