- A
Convert all reference fields to choice fields with a predefined list.
Why wrong: Changing field types alters the data model and may not accommodate all necessary values from large reference tables.
- B
Write a client script to load reference options asynchronously using GlideAjax.
Why wrong: This duplicates functionality that already exists in the platform and requires custom code maintenance.
- C
Add a reference qualifier to each reference field to limit the number of options displayed.
Why wrong: While this reduces the query size, the options are still loaded synchronously and may not solve the 10-second load issue.
- D
Enable the 'Use Ajax on Reference' option on the dictionary records for the reference fields.
This loads reference options asynchronously, allowing the form to render quickly while options populate in the background.
Optimize Form Load Time with 'Use Ajax on Reference' Dictionary Option
This SNOW-CSA practice question tests your understanding of ui, navigation and forms. 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 company uses a custom application with a table named 'project_task' that contains several reference fields pointing to large tables (e.g., 'User', 'Department'). Users report that the 'project_task' form takes over 10 seconds to load, primarily due to the time required to fetch options for these reference fields. The administrator wants to improve the form loading performance without removing any fields or changing the user workflow. The instance is on a standard license and performance optimization is a priority. Which approach should the administrator take?
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
Enable the 'Use Ajax on Reference' option on the dictionary records for the reference fields.
Option D is correct because enabling 'Use Ajax on Reference' on the dictionary records causes the reference fields to load their options asynchronously via AJAX after the form renders, rather than during the initial page load. This significantly reduces the initial load time because the large reference tables (e.g., 'User', 'Department') are not queried synchronously when the form is first opened.
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.
- ✗
Convert all reference fields to choice fields with a predefined list.
Why it's wrong here
Changing field types alters the data model and may not accommodate all necessary values from large reference tables.
- ✗
Write a client script to load reference options asynchronously using GlideAjax.
Why it's wrong here
This duplicates functionality that already exists in the platform and requires custom code maintenance.
- ✗
Add a reference qualifier to each reference field to limit the number of options displayed.
Why it's wrong here
While this reduces the query size, the options are still loaded synchronously and may not solve the 10-second load issue.
- ✓
Enable the 'Use Ajax on Reference' option on the dictionary records for the reference fields.
Why this is correct
This loads reference options asynchronously, allowing the form to render quickly while options populate in the background.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think a reference qualifier (Option C) will improve performance by reducing the dataset, but they overlook that the query still executes synchronously during page load, whereas 'Use Ajax on Reference' changes the loading mechanism itself to be asynchronous.
Detailed technical explanation
How to think about this question
The 'Use Ajax on Reference' option leverages the GlideAjax mechanism built into ServiceNow's UI16 and later frameworks. When enabled, the reference field initially shows a text box or a 'loading' indicator, and the list of options is fetched via an asynchronous AJAX call after the form DOM is ready, allowing the rest of the form to render immediately. This is particularly effective for tables with millions of records, as it avoids blocking the synchronous page load with a heavy database query.
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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UI, Navigation and Forms — study guide chapter
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FAQ
Questions learners often ask
What does this SNOW-CSA question test?
UI, Navigation and Forms — This question tests UI, Navigation and Forms — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable the 'Use Ajax on Reference' option on the dictionary records for the reference fields. — Option D is correct because enabling 'Use Ajax on Reference' on the dictionary records causes the reference fields to load their options asynchronously via AJAX after the form renders, rather than during the initial page load. This significantly reduces the initial load time because the large reference tables (e.g., 'User', 'Department') are not queried synchronously when the form is first opened.
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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