SNOW-CAD Designing interfaces and user experiences Practice Question
A developer is creating a service portal widget that shows a list of active incidents. The data should be refreshed every 30 seconds. What is the recommended design pattern?
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
✓
Use a widget option to set the refresh rate and a server-side script to fetch data.
Using a server-side script with a polling model is the standard approach to periodically fetch data in a widget without overloading the client.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use a server-side script with a polling model to return data on a timer.
Why it's wrong here
Server-side polling alone does not push data; client needs to request.
- ✗
Use a third-party library for WebSocket connections.
Why it's wrong here
WebSockets are not natively supported in Service Portal and add complexity.
- ✓
Use a widget option to set the refresh rate and a server-side script to fetch data.
Why this is correct
This combines a configurable option with server-side data retrieval, following best practices.
- ✗
Use a client-side JavaScript interval to reload the page.
Why it's wrong here
Reloading the entire page is inefficient and provides poor user experience.
Go deeper
Related to this question
About these practice questions
One of 481 original SNOW-CAD practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.