20 Validation Rules Interview Questions and Answers

Validation rules are an important part of any web development project. They help ensure that data entered into a form is clean, correct and complete. When applying for a web development position, it is likely that you will be asked about your experience and knowledge of validation rules. In this article, we review some of the most common validation rules questions and how you should answer them.

Validation Rules Interview Questions and Answers

Here are 20 commonly asked Validation Rules interview questions and answers to prepare you for your interview:

1. Can you explain what a validation rule is?

A validation rule is a rule that is used to check whether a piece of data meets certain criteria. For example, a validation rule for an email address might check that the data contains a “@” symbol and a “.”.

2. What’s the difference between a validation rule and a workflow trigger?

A validation rule is a rule that is enforced by the Salesforce system whenever a record is saved. A workflow trigger is a rule that is enforced by a workflow that is set up to run on a schedule.

3. How do you create a new validation rule?

You can create a new validation rule by going to the “Validation Rules” section of the Salesforce setup menu. From there, you can click the “New” button to create a new rule.

4. Why should we use custom validation rules in Salesforce instead of just adding code to Apex triggers or Visualforce pages?

Custom validation rules are a declarative way to add business logic to Salesforce, and they can be easily turned on or off without having to modify code. Additionally, custom validation rules can be used to display error messages to users in the Salesforce UI, which can help guide users to enter valid data.

5. Is it possible to write complex formulas for creating validation rules? If yes, then how?

Yes, it is possible to write complex formulas for creating validation rules. You can use the “Formula” option when creating a validation rule to specify a formula that must be met in order for the rule to be valid. The formula can be as simple or complex as you need it to be.

6. When are validation rules evaluated?

Validation rules are evaluated whenever a record is saved. This includes when a record is created, edited, or deleted.

7. Are there any performance implications when using validation rules?

Yes, there can be performance implications when using validation rules. If a validation rule is not well-written, it can cause a significant performance hit when the rule is triggered. This is why it is important to test validation rules before deploying them to a production environment.

8. What data types can be used with validation rules in Salesforce?

Validation rules in Salesforce can be used with the following data types:

-Text
-Number
-Percent
-Currency
-Date
-Date/Time
-Email
-Phone
-URL

9. How does a validation rule work with field dependencies?

A validation rule is a rule that is used to validate data in a field. A field dependency is a field that is required in order for another field to be populated. A validation rule with field dependencies will ensure that the data in the field is valid and that the field dependencies are met before the data in the field can be saved.

10. What are some best practices for writing validation rules in Salesforce?

When writing validation rules in Salesforce, it is important to keep in mind that the goal is to ensure data quality and integrity. As such, your validation rules should be specific and clear in what they are trying to accomplish. Additionally, it is important to test your validation rules thoroughly before deploying them, in order to avoid any potential issues.

11. How many characters can be included in a validation rule formula?

A validation rule formula can include up to 2,048 characters.

12. What happens if a validation rule returns an error message that exceeds 255 characters?

If a validation rule returns an error message that exceeds 255 characters, the message will be truncated to 255 characters.

13. What happens if a validation rule contains errors when trying to save a record?

If a validation rule contains errors when trying to save a record, the record will not be saved and an error message will be displayed.

14. What are the different ways by which a validation rule can return an error message?

A validation rule can return an error message in one of three ways: by displaying the message in a dialog box, by writing the message to a log file, or by issuing a warning in the event viewer.

15. What are the differences between Standard Validation Rules and Custom Validation Rules?

Standard validation rules are those that come with the XML schema language, and custom validation rules are those that are created by the user. Standard validation rules are usually more restrictive, and custom validation rules can be more flexible.

16. What are some of the limitations of using validation rules in Salesforce?

Validation rules can be bypassed by certain user permissions, so it is important to keep that in mind when relying on them for data integrity. Additionally, validation rules are only enforced when a record is saved, so it is possible for users to enter invalid data that is only caught when the record is attempted to be saved.

17. What are the limits on the number of active validation rules per object type?

The maximum number of active validation rules per object type is 1,000.

18. How would you test a validation rule before making it live?

The best way to test a validation rule is to create a test document that includes data that should pass the validation, as well as data that should fail the validation. Once you have created this test document, you can then run it through a validation tool to see if it produces the expected results.

19. Is it possible to have multiple error messages returned by a single validation rule?

Yes, it is possible to have multiple error messages returned by a single validation rule. This can be accomplished by using the “|” character to separate the different error messages that you want to return.

20. Is it possible to display more than one error message at a time when a validation rule fails?

Yes, it is possible to display more than one error message at a time when a validation rule fails. This can be accomplished by using a combination of the min and max attributes on the validation rule. By setting these attributes, you can specify the minimum and maximum number of error messages that should be displayed.