The correct answer is that the script may cause an infinite loop if the same business rule triggers on update. This happens because calling gr.update() within a business rule that runs on the update event will re-fire the rule each time a record is saved, creating a self-referential cycle that never terminates. On the ServiceNow Certified Application Developer CAD exam, this scenario tests your understanding of business rule execution order and the dangers of recursive updates—a common trap where candidates overlook that update() triggers the same rule again. The key distinction is that while loops iterating over records are safe, but any update inside a rule that runs on update must be guarded with a condition like current.operation() or a flag to break the cycle. Memory tip: think of it as a “loop within a loop”—if your business rule updates the same table it runs on, always ask yourself whether the rule will fire again on that update.
SNOW-CAD Practice Question: Automating application logic with business rules and scripts
This SNOW-CAD practice question tests your understanding of automating application logic with business rules and scripts. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Exhibit
Refer to the exhibit.
var gr = new GlideRecord('incident');
gr.addQuery('category', 'network');
gr.query();
while(gr.next()){
gr.setValue('state', 2);
gr.update();
}
The above script runs in a business rule on the Incident table. What is a potential issue with this script?
Refer to the exhibit.
var gr = new GlideRecord('incident');
gr.addQuery('category', 'network');
gr.query();
while(gr.next()){
gr.setValue('state', 2);
gr.update();
}
A
It will only update the first matching record.
Why wrong: Incorrect; the while loop processes all matching records.
B
It may cause an infinite loop if the same business rule triggers on update.
Correct; the script updates incidents, and if the business rule also fires on update, it can trigger recursively.
C
It uses a deprecated API.
Why wrong: Incorrect; GlideRecord is not deprecated.
D
It will not commit changes because update() is not used correctly.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It may cause an infinite loop if the same business rule triggers on update.
Option B is correct because updating incidents using gr.update() could trigger the same business rule again (if the rule runs on update), causing an infinite loop. Option A is incorrect because the API is not deprecated. Option C is incorrect because update() does commit changes. Option D is incorrect because the while loop iterates all matching records.
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.
✗
It will only update the first matching record.
Why it's wrong here
Incorrect; the while loop processes all matching records.
✓
It may cause an infinite loop if the same business rule triggers on update.
Why this is correct
Correct; the script updates incidents, and if the business rule also fires on update, it can trigger recursively.
Related concept
Read the scenario before looking for a memorised answer.
✗
It uses a deprecated API.
Why it's wrong here
Incorrect; GlideRecord is not deprecated.
✗
It will not commit changes because update() is not used correctly.
Why it's wrong here
Incorrect; update() commits changes properly.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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
Got this wrong? Here's your next step.
Identify which SNOW-CAD exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Automating application logic with business rules and scripts — This question tests Automating application logic with business rules and scripts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: It may cause an infinite loop if the same business rule triggers on update. — Option B is correct because updating incidents using gr.update() could trigger the same business rule again (if the rule runs on update), causing an infinite loop. Option A is incorrect because the API is not deprecated. Option C is incorrect because update() does commit changes. Option D is incorrect because the while loop iterates all matching records.
What should I do if I get this SNOW-CAD question wrong?
Identify which SNOW-CAD exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.