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Question 73 of 520
Service Catalog and Workflows →hardMultiple ChoiceObjective-mapped

Client Script Email Validation on Blur — Invalid Format Error

This SNOW-CSA practice question tests your understanding of service catalog and workflows. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

Exhibit

Catalog Client Script: 'Validate Email' on variable 'email' (type: email)
Script:
function onChange(control, oldValue, newValue, isLoading, isTemplate) {
   if (isLoading || newValue === '') {
      return;
   }
   var pattern = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
   if (!pattern.test(newValue)) {
      g_form.showFieldMsg('email', 'Invalid email format', 'error');
      g_form.setValue('email', '');
   }
}

Variable: 'email' (type: email, mandatory: true)
Catalog Item: 'Contact Us'

Refer to the exhibit. A user enters 'user@example' into the email field and tabs out. What happens?

Exhibit

Catalog Client Script: 'Validate Email' on variable 'email' (type: email)
Script:
function onChange(control, oldValue, newValue, isLoading, isTemplate) {
   if (isLoading || newValue === '') {
      return;
   }
   var pattern = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
   if (!pattern.test(newValue)) {
      g_form.showFieldMsg('email', 'Invalid email format', 'error');
      g_form.setValue('email', '');
   }
}

Variable: 'email' (type: email, mandatory: true)
Catalog Item: 'Contact Us'

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The field shows an error message 'Invalid email format' and the entered value is cleared.

The correct answer is C because the script runs on blur (when the user tabs out) and validates the email format. Since 'user@example' lacks a top-level domain (e.g., .com), it fails RFC 5322 validation, triggering the 'Invalid email format' error message and clearing the field value as defined in the script logic.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    Nothing happens because the script only runs on load.

    Why it's wrong here

    Incorrect. The script runs onChange, not only on load.

  • ✗

    The form is submitted successfully because the field type is email.

    Why it's wrong here

    Incorrect. The client script runs client-side and prevents submission with error.

  • ✓

    The field shows an error message 'Invalid email format' and the entered value is cleared.

    Why this is correct

    Correct. The script shows the error and clears the field.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    The field shows an error message but the entered value remains.

    Why it's wrong here

    Incorrect. The script explicitly sets the value to empty string.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates assume the native 'email' field type handles all validation automatically, but ServiceNow allows custom scripts to override or extend validation, and the script in this question explicitly clears the field on failure.

Detailed technical explanation

How to think about this question

Under the hood, ServiceNow uses client-side scripts (like onChange or onBlur) attached to catalog variables to enforce custom validation. The email validation typically uses a regex pattern conforming to RFC 5322, which requires a domain with at least one dot (e.g., example.com). In real-world scenarios, this prevents users from submitting malformed email addresses that could break downstream integrations like notification systems or LDAP lookups.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A practitioner preparing for the SNOW-CSA exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this SNOW-CSA question test?

Service Catalog and Workflows — This question tests Service Catalog and Workflows — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The field shows an error message 'Invalid email format' and the entered value is cleared. — The correct answer is C because the script runs on blur (when the user tabs out) and validates the email format. Since 'user@example' lacks a top-level domain (e.g., .com), it fails RFC 5322 validation, triggering the 'Invalid email format' error message and clearing the field value as defined in the script logic.

What should I do if I get this SNOW-CSA question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jul 4, 2026

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This SNOW-CSA practice question is part of Courseiva's free ServiceNow certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SNOW-CSA exam.