SNOW-CAD Core Application Development Practice Question
This SNOW-CAD practice question tests your understanding of core application development. 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.
ACL Condition Script:
(function checkMembership() {
if (gs.hasRole('itil') && current.assignment_group.isMemberOf(gs.getUserID())) {
return true;
}
return false;
})();
The exhibit shows an ACL condition script intended to allow read access to an incident only if the user has the 'itil' role and is a member of the incident's assignment group. However, users who are members of the assignment group but do not have the 'itil' role are still able to read the incident. What is the most likely problem?
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.
Refer to the exhibit.
ACL Condition Script:
(function checkMembership() {
if (gs.hasRole('itil') && current.assignment_group.isMemberOf(gs.getUserID())) {
return true;
}
return false;
})();
A
The condition script must return true explicitly for the ACL to deny access.
Why wrong: ACLs with condition scripts return true to grant, false to deny, which is correct.
B
The ACL is set to condition type 'script' but the script is not structured correctly.
Why wrong: The script structure is valid.
C
The isMemberOf method requires a group sys_id, not a user ID.
Why wrong: isMemberOf is a method on a GlideRecord field that checks if a user is a member of the group. The argument is the user ID, which is correct.
D
There is another ACL on the incident table that grants read access to users with the 'itil' role without the group membership check.
If another ACL grants access, it overrides the denial from this ACL.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
There is another ACL on the incident table that grants read access to users with the 'itil' role without the group membership check.
Option D is correct because ServiceNow ACLs are evaluated in a hierarchy: if any ACL on the same table and operation grants access, the user is allowed. Even if the intended ACL correctly denies access when the group membership check fails, another ACL that grants read access to users with the 'itil' role (without the group condition) will override the denial. The condition script in the intended ACL never gets a chance to block the user because the granting ACL is evaluated first and returns true.
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.
✗
The condition script must return true explicitly for the ACL to deny access.
Why it's wrong here
ACLs with condition scripts return true to grant, false to deny, which is correct.
✗
The ACL is set to condition type 'script' but the script is not structured correctly.
Why it's wrong here
The script structure is valid.
✗
The isMemberOf method requires a group sys_id, not a user ID.
Why it's wrong here
isMemberOf is a method on a GlideRecord field that checks if a user is a member of the group. The argument is the user ID, which is correct.
✓
There is another ACL on the incident table that grants read access to users with the 'itil' role without the group membership check.
Why this is correct
If another ACL grants access, it overrides the denial from this ACL.
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume a single ACL's condition script is evaluated in isolation, when in fact ServiceNow evaluates all ACLs for the same table and operation, and a granting ACL elsewhere can override a denying one.
Detailed technical explanation
How to think about this question
ServiceNow ACL evaluation follows a 'first match wins' model where the system iterates through all ACLs for the given table and operation. If any ACL returns true (grant), the user is allowed, and subsequent ACLs are not evaluated. This means a less restrictive ACL placed higher in the order can bypass a more restrictive one. In real-world scenarios, administrators often forget to check for existing 'read' ACLs on the incident table, such as the default 'incident.*' ACL that grants access to users with the 'itil' role, which would override a custom ACL with additional group conditions.
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 security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
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: There is another ACL on the incident table that grants read access to users with the 'itil' role without the group membership check. — Option D is correct because ServiceNow ACLs are evaluated in a hierarchy: if any ACL on the same table and operation grants access, the user is allowed. Even if the intended ACL correctly denies access when the group membership check fails, another ACL that grants read access to users with the 'itil' role (without the group condition) will override the denial. The condition script in the intended ACL never gets a chance to block the user because the granting ACL is evaluated first and returns true.
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.
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Question Discussion
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