Validation rules are executed for fields that arc stored in the object but not part of the displayed page layout.
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A. B.A.
Explanation/Reference: Validation rules are executed for all fields on an object regardless of whether or not they are displayed on the page layout.
Validation rules are executed when a record is saved, regardless of whether the fields being validated are displayed on the page layout or not. Therefore, the answer is:
A. True
Validation rules are used to enforce data quality and consistency in Salesforce. They allow you to specify certain conditions that must be met before a record can be saved. For example, you could create a validation rule that requires a contact's email address to be in a valid format. If someone tries to save a contact record with an invalid email address, they will receive an error message and the record will not be saved.
Validation rules can be applied to any field on an object, regardless of whether that field is displayed on the page layout or not. This means that even if a field is not visible to the user, its value will still be checked against any applicable validation rules when the record is saved.
It is worth noting that while validation rules can help ensure data quality, they should not be relied on as the sole means of data validation. It is also important to use other tools such as field-level validation rules, required fields, and data type settings to ensure that data is entered correctly and consistently.