The correct answer is to create a Scripted REST API in Studio. This approach is correct because Scripted REST APIs allow developers to define custom endpoints directly within ServiceNow Studio, giving full control over request handling, response formatting, and business logic for exposing a custom table’s data. On the ServiceNow Certified Application Developer (CAD) exam, this question tests your understanding of when to use Studio-based development versus out-of-box REST APIs; a common trap is assuming the Table API can be used directly without ACL configuration, but that method requires extensive access control setup and is not a Studio feature. Remember that Studio is the development environment for building custom solutions, so when you need to expose a custom table with tailored logic, Scripted REST API is your tool. A helpful memory tip: think “Scripted = Studio Custom” to distinguish it from the generic Table API.
SNOW-CAD Practice Question: Application development using ServiceNow Studio
This SNOW-CAD practice question tests your understanding of application development using servicenow studio. 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 developer needs to expose a custom table's data via REST API in ServiceNow Studio. Which approach should they use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a Scripted REST API in Studio.
Option A is correct because Scripted REST API allows creating custom endpoints in Studio. Option B is wrong as the table API requires ACLs and is not directly available. Option C is wrong because configuring from the system Web Services menu is not part of Studio. Option D is wrong because generating an API from the Application Menu is not a standard Studio feature.
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.
✗
Configure a REST API from the system Web Services menu.
Why it's wrong here
Incorrect. This is done outside of Studio.
✓
Create a Scripted REST API in Studio.
Why this is correct
Correct. Studio provides a template for Scripted REST APIs.
Related concept
Standard ACLs match source addresses.
✗
Generate an API from the Application Menu.
Why it's wrong here
Incorrect. Studio does not have an 'Generate API' option.
✗
Use the table API directly without any configuration.
Why it's wrong here
Incorrect. Table API requires ACLs and is not directly exposed via Studio.
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.
Application development using ServiceNow Studio — This question tests Application development using ServiceNow Studio — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Create a Scripted REST API in Studio. — Option A is correct because Scripted REST API allows creating custom endpoints in Studio. Option B is wrong as the table API requires ACLs and is not directly available. Option C is wrong because configuring from the system Web Services menu is not part of Studio. Option D is wrong because generating an API from the Application Menu is not a standard Studio feature.
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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