ServiceNow Certified System Administration Practice

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How is read-only status applied to fields in ServiceNow?

Through Data Policies
By using UI Actions
With a defined Client Script
By modifying system properties

The correct answer is: With a defined Client Script

Read-only status for fields in ServiceNow is applied through defined Client Scripts. Client Scripts are JavaScript code snippets that run on the client side, allowing for dynamic behavior in the user interface based on given conditions. When a Client Script is set to make a field read-only, it prevents users from editing that field value while still allowing it to be displayed. In many scenarios, Client Scripts are used to enforce specific business logic or user requirements by changing the form behavior dynamically. For instance, a script can check a particular condition, such as user roles, field values, or state of the record, and based on this, it can toggle the read-only property of one or more fields. This functionality is distinct from the other options listed. Data Policies, for example, are primarily used for data validation and manipulation when records are inserted or updated, not specifically for making fields read-only in the UI. UI Actions are typically for triggering actions like saving or deleting records, rather than altering the edit capability of fields directly. Modifying system properties focuses on overall system behavior rather than granular control over individual field attributes.