SNOW-CAD User Interface Development Practice Question
Which THREE factors contribute to poor UI performance in ServiceNow forms and portals? (Choose three.)
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
✓
Large number of catalog client scripts in a variable set
Correct options B, C, and E. In ServiceNow, poor UI performance can be caused by excessive client scripts (B), multiple client scripts firing on the 'load' event (C), and unindexed GlideRecord queries in UI Macro server scripts (E). Option A is incorrect because simple conditions in UI Policies are lightweight and do not significantly impact performance. Option D is incorrect because CSS custom properties are a modern feature that can actually improve performance by reducing repeated styles.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Using simple conditions in UI Policies
Why it's wrong here
Simple conditions are efficient and not a cause of poor performance.
- ✓
Large number of catalog client scripts in a variable set
Why this is correct
Variable sets can have many client scripts that execute on load.
- ✓
Multiple client scripts firing on 'load' event
Why this is correct
Each client script adds to page processing time.
- ✗
Use of CSS custom properties
Why it's wrong here
CSS variables have minimal performance impact and are recommended.
- ✓
Unindexed GlideRecord queries in UI Macro server scripts
Why this is correct
Unindexed queries cause full table scans, slowing down page load.
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