The correct answer is that the record is not saved and an error message 'State change is not allowed' is displayed. This occurs because a 'before' business rule uses `current.setAbortAction(true)` to halt the database operation when a state transition from '2' to '1' is attempted, paired with `gs.addErrorMessage()` to surface the specific message to the user. On the ServiceNow Certified Application Developer CAD exam, this tests your understanding of business rule abort action for state transitions, a key pattern for enforcing workflow integrity. A common trap is confusing 'before' and 'after' business rules—remember that only a 'before' rule can abort the save, while an 'after' rule runs too late to prevent it. Memory tip: think of setAbortAction as a "bouncer" that stops an invalid state change at the door, with the error message as the reason given to the user.
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.
Exhibit
Refer to the exhibit.
Exhibit (Business Rule script):
```javascript
(function executeRule(current, previous /*null when async*/) {
if (current.state == 1 && previous.state == 2) {
gs.addErrorMessage('State change is not allowed');
current.setAbortAction(true);
}
})(current, previous);
```
What happens when a user changes the state from '2' to '1' on an incident record?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The record is not saved and an error message 'State change is not allowed' is displayed.
Option D is correct because in a 'before' business rule, calling `current.setAbortAction(true)` prevents the database operation from completing and displays the error message specified in `gs.addErrorMessage()`. When the state changes from '2' to '1', the script checks for this condition and aborts the save, showing 'State change is not allowed'. This is a standard pattern for enforcing state transition restrictions in ServiceNow.
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.
✗
Nothing happens because the script does not have a return statement.
Why it's wrong here
The script does not need a return; setAbortAction works.
✗
The record is saved without any message because setAbortAction is ignored in 'before' rules.
Why it's wrong here
setAbortAction is valid in 'before' Business Rules.
✗
The record is saved and a message 'State change is not allowed' is shown.
Why it's wrong here
setAbortAction(true) prevents the save.
✓
The record is not saved and an error message 'State change is not allowed' is displayed.
Why this is correct
The condition matches, so the action is aborted and error shown.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'before' business rules with 'after' rules, mistakenly thinking that `setAbortAction` only works in 'after' rules or that a missing return statement causes the rule to be ignored.
Detailed technical explanation
How to think about this question
Under the hood, `current.setAbortAction(true)` sets a flag in the GlideRecord transaction that causes the database commit to be skipped after all 'before' rules have run. The `gs.addErrorMessage()` method queues a message that is rendered to the user via the UI or REST response. In real-world scenarios, this is critical for enforcing business logic like preventing re-opening of closed incidents or blocking invalid state transitions in lifecycle management.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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.
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 record is not saved and an error message 'State change is not allowed' is displayed. — Option D is correct because in a 'before' business rule, calling `current.setAbortAction(true)` prevents the database operation from completing and displays the error message specified in `gs.addErrorMessage()`. When the state changes from '2' to '1', the script checks for this condition and aborts the save, showing 'State change is not allowed'. This is a standard pattern for enforcing state transition restrictions in ServiceNow.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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