The answer is that the portal page has a visibility condition excluding the user. This happens because widget server scripts, even when they use GlideRecord to query the 'incident' table, must respect ACLs, but the portal itself applies an additional layer of user criteria. If the widget shows no data despite the user having 'itil' role and seeing incidents in the backend, the portal’s visibility condition is likely filtering the user out based on roles or user criteria that differ from backend permissions. On the ServiceNow Certified Application Developer CAD exam, this tests your understanding that portal visibility is separate from backend data access—a common trap is assuming backend access guarantees frontend display. Remember that portal visibility conditions act like a gatekeeper before any server-side script runs. Memory tip: “Backend sees, portal blocks—check the visibility locks.”
SNOW-CAD Designing interfaces and user experiences Practice Question
This SNOW-CAD practice question tests your understanding of designing interfaces and user experiences. 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 widget's server script retrieves data from the 'incident' table using GlideRecord. A user with 'itil' role can see some incidents in the backend but the widget shows no data. What could be the reason?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The portal page has a visibility condition that excludes the user
Widget server scripts respect ACLs. If the widget is assigned to a portal that does not have the correct user criteria, or if the user's portal roles differ from backend roles, the data may not be visible.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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 GlideRecord query does not include the user's assignment group filter
Why it's wrong here
Incorrect: That would also affect backend view.
✓
The portal page has a visibility condition that excludes the user
Why this is correct
Correct: The widget may be hidden due to user criteria.
Related concept
Standard ACLs match source addresses.
✗
The widget is using client-side REST API instead of server-side
Why it's wrong here
Incorrect: If it were client-side, the user might see even more data.
✗
The widget's server script is not returning data because of a syntax error
Why it's wrong here
Incorrect: A syntax error would cause a server error, not empty data.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SNOW-CAD ACL questions on filtering logic and placement.
Designing interfaces and user experiences — This question tests Designing interfaces and user experiences — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: The portal page has a visibility condition that excludes the user — Widget server scripts respect ACLs. If the widget is assigned to a portal that does not have the correct user criteria, or if the user's portal roles differ from backend roles, the data may not be visible.
What should I do if I get this SNOW-CAD question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SNOW-CAD ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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