SNOW-CAD Practice Question: Automating application logic with business rules and scripts
Which THREE factors should be considered when designing a Business Rule for optimal performance? (Select THREE)
⚠ Common exam trap
Candidates often confuse client-side performance concerns (like synchronous GlideAjax) with server-side Business Rule optimization, or assume that running a rule 'before' always improves performance without considering the specific logic and context.
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
✓
Limit the use of gs.log() statements in production.
Excessive gs.log() statements in production can degrade performance by writing to the system log, which consumes I/O resources and can fill up the database. In ServiceNow, logging should be minimized or removed in production scripts to avoid unnecessary overhead, especially in high-volume Business Rules.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Avoid using synchronous GlideAjax calls.
Why it's wrong here
GlideAjax is client-side, not in Business Rules.
- ✓
Limit the use of gs.log() statements in production.
Why this is correct
Logging can impact performance.
- ✓
Use GlideAggregate instead of GlideRecord for calculations.
Why this is correct
More efficient for aggregate functions.
- ✓
Use 'current' and 'previous' instead of querying the database.
Why this is correct
Reduces database calls.
- ✗
Set the Business Rule to run on 'before' if possible.
Why it's wrong here
Not a performance consideration.
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