- A
There is a script error that is being ignored because the Business Rule is set to 'true' for 'Run asynchronously'.
Why wrong: Asynchronous rules still log errors; a script error would prevent the update.
- B
The script is missing the .update() method on the GlideRecord object after setting field values.
Without calling update(), the changes are not persisted to the database.
- C
The Business Rule runs in a separate transaction and the update is rolled back.
Why wrong: Business Rules run in the same transaction as the triggering record update; no rollback occurs unless there is an exception.
- D
The user running the script does not have write access to the related table.
Why wrong: If the script runs with the user's rights and they lack access, an error would typically occur, not silent failure.
SNOW-CAD Core Application Development Practice Question
This SNOW-CAD practice question tests your understanding of core application development. 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 company has a Business Rule that runs after a record is updated. The rule needs to update a related record on a different table. However, the related record update is not being saved. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
The script is missing the .update() method on the GlideRecord object after setting field values.
Option B is correct because in ServiceNow, when a Business Rule modifies a GlideRecord object (e.g., setting field values on a related record), the changes are not persisted to the database until the `.update()` method is explicitly called. Without `.update()`, the script runs without error but the modifications are lost, which is the most common cause of an update not being saved.
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.
- ✗
There is a script error that is being ignored because the Business Rule is set to 'true' for 'Run asynchronously'.
Why it's wrong here
Asynchronous rules still log errors; a script error would prevent the update.
- ✓
The script is missing the .update() method on the GlideRecord object after setting field values.
Why this is correct
Without calling update(), the changes are not persisted to the database.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The Business Rule runs in a separate transaction and the update is rolled back.
Why it's wrong here
Business Rules run in the same transaction as the triggering record update; no rollback occurs unless there is an exception.
- ✗
The user running the script does not have write access to the related table.
Why it's wrong here
If the script runs with the user's rights and they lack access, an error would typically occur, not silent failure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ServiceNow often tests the misconception that setting field values on a GlideRecord object automatically saves the record, when in fact the `.update()` method is mandatory to persist changes.
Detailed technical explanation
How to think about this question
Under the hood, GlideRecord uses a database transaction that is committed when the script completes; calling `.update()` queues the insert/update operation, and without it, the object's field changes exist only in memory. A subtle behavior is that if the Business Rule is set to 'Before' or 'After' and the related record is the same table, the system might auto-save in some contexts (e.g., via `current.update()`), but for a different table, `.update()` is always required. In real-world scenarios, developers often forget this when using `new GlideRecord('table')` to update a related record, leading to silent failures that are hard to debug.
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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Core Application Development — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this SNOW-CAD question test?
Core Application Development — This question tests Core Application Development — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The script is missing the .update() method on the GlideRecord object after setting field values. — Option B is correct because in ServiceNow, when a Business Rule modifies a GlideRecord object (e.g., setting field values on a related record), the changes are not persisted to the database until the `.update()` method is explicitly called. Without `.update()`, the script runs without error but the modifications are lost, which is the most common cause of an update not being saved.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 30, 2026
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.
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