- A
Implement asynchronous loading of the widget so the page loads without waiting for the timezone
Why wrong: Asynchronous loading allows the page to render without blocking, but the widget itself still takes 10 seconds to load its content, so the user experience remains poor. This does not reduce the actual wait time for the timezone data.
- B
Use client-side JavaScript to detect the timezone from the browser's Intl API instead of server-side API call
Why wrong: Using the browser's Intl API detects the user's configured timezone, not their actual geographic location. This may be inaccurate for users who are traveling or whose system settings differ from their physical location. The requirement for accuracy in a global portal makes this approach unsuitable.
- C
Move the geolocation API call to a business rule that runs once per user
Why wrong: Business rules run on the server side, but moving the API call to a business rule does not inherently cache the result. It would still execute on every relevant transaction, leading to repeated slow API calls without performance improvement.
- D
Cache the timezone result in a user preference or session storage after the first request
Caching the timezone result in a user preference (e.g., sys_user_preference) or session storage eliminates redundant API calls for the same user across sessions. This directly reduces load time by avoiding the 10-second geolocation API call on subsequent requests, while maintaining accuracy since the user's IP-based timezone is unlikely to change frequently.
SNOW-CAD Designing interfaces and user experiences Practice Question
This SNOW-CAD practice question tests your understanding of designing interfaces and user experiences. 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 large enterprise is implementing a Service Portal for employees to request IT equipment. The portal must be accessible globally, with users in Europe, Asia, and the Americas. The development team has created a custom widget that displays the user's local time based on their location. The widget uses a server script that calls a third-party geolocation API to determine the user's timezone based on their IP address. However, during peak hours, the widget takes over 10 seconds to load, causing poor user experience. The team also notices that the same timezone is fetched repeatedly for the same user across different sessions. The portal uses a CDN for static assets. Which approach should the developer take to reduce the load time while maintaining accuracy?
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
Cache the timezone result in a user preference or session storage after the first request
Option D is correct because caching the timezone result in a user preference or session storage eliminates redundant API calls for the same user across sessions. This directly reduces load time by avoiding the 10-second geolocation API call on subsequent requests, while maintaining accuracy since the user's IP-based timezone is unlikely to change frequently. In ServiceNow, storing this data in a user preference (e.g., `sys_user_preference`) or session storage ensures persistence without repeated server-side processing.
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.
- ✗
Implement asynchronous loading of the widget so the page loads without waiting for the timezone
Why it's wrong here
Asynchronous loading allows the page to render without blocking, but the widget itself still takes 10 seconds to load its content, so the user experience remains poor. This does not reduce the actual wait time for the timezone data.
- ✗
Use client-side JavaScript to detect the timezone from the browser's Intl API instead of server-side API call
Why it's wrong here
Using the browser's Intl API detects the user's configured timezone, not their actual geographic location. This may be inaccurate for users who are traveling or whose system settings differ from their physical location. The requirement for accuracy in a global portal makes this approach unsuitable.
- ✗
Move the geolocation API call to a business rule that runs once per user
Why it's wrong here
Business rules run on the server side, but moving the API call to a business rule does not inherently cache the result. It would still execute on every relevant transaction, leading to repeated slow API calls without performance improvement.
- ✓
Cache the timezone result in a user preference or session storage after the first request
Why this is correct
Caching the timezone result in a user preference (e.g., sys_user_preference) or session storage eliminates redundant API calls for the same user across sessions. This directly reduces load time by avoiding the 10-second geolocation API call on subsequent requests, while maintaining accuracy since the user's IP-based timezone is unlikely to change frequently.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ServiceNow often tests the misconception that client-side JavaScript (Intl API) is a drop-in replacement for server-side geolocation, but the trap here is that the Intl API returns the browser's configured timezone, not the user's actual geographic location, which fails the accuracy requirement for a globally accessible portal.
Detailed technical explanation
How to think about this question
ServiceNow user preferences are stored in the `sys_user_preference` table and persist across sessions, making them ideal for caching per-user data like timezone. Session storage (`gs.getSession().putClientData()`) is faster but ephemeral, lasting only until the session expires. The geolocation API call typically uses HTTP GET to a service like ip-api.com, which can take 2–10 seconds under load; caching avoids this latency entirely. In a real-world scenario, a global enterprise with thousands of concurrent users would see significant CDN and server load reduction by caching, as the API call is replaced with a simple database lookup.
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-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
Questions learners often ask
What does this SNOW-CAD question test?
Designing interfaces and user experiences — This question tests Designing interfaces and user experiences — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Cache the timezone result in a user preference or session storage after the first request — Option D is correct because caching the timezone result in a user preference or session storage eliminates redundant API calls for the same user across sessions. This directly reduces load time by avoiding the 10-second geolocation API call on subsequent requests, while maintaining accuracy since the user's IP-based timezone is unlikely to change frequently. In ServiceNow, storing this data in a user preference (e.g., `sys_user_preference`) or session storage ensures persistence without repeated server-side processing.
What should I do if I get this SNOW-CAD 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: Jun 30, 2026
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