Quick Answer
The answer is an onLoad client script. This is the correct choice because it runs automatically in the browser when a form loads, before any user interaction, making it ideal for setting a field value based on the current user’s department at the moment the form opens. The script executes after the form data is retrieved, allowing you to immediately populate fields using client-side APIs like `g_user.getDepartmentID()`. On the ServiceNow Certified Application Developer CAD exam, this question tests your understanding of client script types and their execution triggers—a common trap is confusing onLoad with onChange or onSubmit, which run under different conditions. Remember that onLoad fires once per form open, so it’s perfect for one-time field population based on user context. A simple memory tip: “Load it once, set it on sight.”
This SNOW-CAD practice question tests your understanding of application development using servicenow studio. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
A developer wants to use ServiceNow Studio to create a client script that runs when a form loads and sets a field value based on the current user's department. Which type of client script should be used?
onLoad client script
onLoad runs when the form is opened.
onChange client script
Why wrong: onChange triggers on field value change, not on form load.
onSubmit client script
Why wrong: onSubmit runs on form submission.
onCellEdit client script
Why wrong: onCellEdit is for list views, not forms.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
onLoad client script
An onLoad client script runs automatically when a form is opened, making it the correct choice for setting a field value based on the current user's department at the time the form loads. This script type executes in the browser after the form data is retrieved but before the user interacts with the form, allowing immediate field population.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
onLoad client script
Why this is correct
onLoad runs when the form is opened.
Related concept
Read the scenario before looking for a memorised answer.
onChange client script
Why it's wrong here
onChange triggers on field value change, not on form load.
onSubmit client script
Why it's wrong here
onSubmit runs on form submission.
onCellEdit client script
Why it's wrong here
onCellEdit is for list views, not forms.
Common exam traps
The trap here is that candidates may confuse onLoad with onChange, thinking a field change event is needed to set a value, but the requirement explicitly states 'when a form loads', which directly maps to the onLoad client script type.
Detailed technical explanation
OnLoad client scripts are part of the g_scratchpad or g_form API and execute in the UI16 or UI17 context. They can access the current user's department via GlideUser.getUser().getDepartmentID() or g_user.getDepartmentID() in client-side scripts, but note that direct GlideRecord calls are not available client-side; instead, you would typically use a GlideAjax call to retrieve the department name if needed. A common real-world scenario is auto-populating a 'Location' field based on the user's department to reduce data entry errors.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the SNOW-CAD 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
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FAQ
Application development using ServiceNow Studio — This question tests Application development using ServiceNow Studio — Read the scenario before looking for a memorised answer..
The correct answer is: onLoad client script — An onLoad client script runs automatically when a form is opened, making it the correct choice for setting a field value based on the current user's department at the time the form loads. This script type executes in the browser after the form data is retrieved but before the user interacts with the form, allowing immediate field population.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This SNOW-CAD 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-CAD exam.
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