Quick Answer
The best practice when creating REST API endpoints is to use versioning in the API path, such as /api/now/v1/incident. This approach is correct because it allows you to introduce changes, updates, or new features to your API without breaking existing consumers who rely on a stable interface. By embedding the version number directly in the URL, you provide a clear contract: consumers targeting v1 will always receive the expected behavior, even as you release v2 or v3. On the ServiceNow Certified Application Developer CAD exam, this concept tests your understanding of API lifecycle management and backward compatibility—a common trap is choosing header-based versioning or ignoring versioning altogether, which can lead to silent failures. Remember the memory tip: “Path first, never break the contract.” This ensures you always prioritize explicit, visible versioning in the endpoint structure to maintain stability for integrations.
This SNOW-CAD practice question tests your understanding of integrating and managing application data. 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.
Which of the following is a best practice when creating REST API endpoints?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Use GET methods for data modification.
Why wrong: GET should be idempotent and not modify data.
Use versioning in the API path.
Correct: Versioning allows backward compatibility.
Pass sensitive data in URL parameters.
Why wrong: Sensitive data should be in headers or body, not URL.
Return all data without pagination.
Why wrong: APIs should implement pagination to avoid large payloads.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use versioning in the API path.
Versioning the API path (e.g., /api/now/v1/incident) is a best practice to manage changes without breaking existing consumers.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Use GET methods for data modification.
Why it's wrong here
GET should be idempotent and not modify data.
Use versioning in the API path.
Why this is correct
Correct: Versioning allows backward compatibility.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Pass sensitive data in URL parameters.
Why it's wrong here
Sensitive data should be in headers or body, not URL.
Return all data without pagination.
Why it's wrong here
APIs should implement pagination to avoid large payloads.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
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
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SNOW-CAD NAT questions on configuration and troubleshooting.
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FAQ
Integrating and managing application data — This question tests Integrating and managing application data — Static NAT maps one inside address to one outside address..
The correct answer is: Use versioning in the API path. — Versioning the API path (e.g., /api/now/v1/incident) is a best practice to manage changes without breaking existing consumers.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SNOW-CAD NAT questions on configuration and troubleshooting.
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 24, 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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