Which of the following describes a Validation rule?
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A rule used to validate that the data entered in a field is an integer.
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A rule used to ensure that all interested persons are apprised of a work object’s status
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A rule used to ensure that all required fields are complete.
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A rule used to validate that a user has the appropriate security to access a part of the application
A Validation rule in Pega is primarily used to ensure that all required fields are complete and that data meets specified criteria. It does not validate data types (that's done by edit validates), check security permissions, or notify interested parties (that's done by routing).
A Validation rule in Pega is used to ensure that all required fields on a form/section are complete (and otherwise satisfy defined conditions) before the user can proceed, which matches the third option. The first option describes a simpler edit-validate/data-type check (integer format), not the general Validation rule concept. The second option describes a notification/correspondence feature (keeping stakeholders informed), unrelated to validation. The fourth option describes an access/security rule (Access of Role to Object), a completely different rule type.