- A
Deploy additional MID Servers to distribute the outbound call load.
Why wrong: MID Servers are not used for Scripted REST APIs; they are for inbound integrations and do not help with outbound HTTP calls from scripts.
- B
Implement a caching layer to store shipping validation results and avoid repeated calls to the external system.
Why wrong: Caching may reduce calls but does not help when a call is made and the synchronous request blocks; the timeout still occurs.
- C
Increase the timeout value in the outbound REST Message record to accommodate peak loads.
Why wrong: Increasing timeout may delay the failure but does not address the underlying thread starvation issue; it may make the problem worse.
- D
Refactor the script to make asynchronous HTTP requests and process the shipping validation response using a separate queue or business rule.
Asynchronous requests free the script while waiting for the external response, allowing the instance to handle more concurrent requests without blocking.
Quick Answer
The correct answer is to refactor the script to make asynchronous HTTP requests and process the shipping validation response using a separate queue or business rule. This resolves the timeout error because synchronous HTTP requests block the script thread until the external system responds; under high concurrency, this creates thread starvation, causing the Scripted REST API to queue requests until they time out with a 504 error. By switching to asynchronous outbound calls, the script immediately releases the thread back to the instance, allowing it to handle more concurrent requests while the external response is processed later via a queue or event. On the ServiceNow Certified Application Developer exam, this scenario tests your understanding of thread management and the GlideHttpRequest vs. SncHttpRequest asynchronous methods—a common trap is assuming the external system is the bottleneck when the real issue is synchronous blocking. Remember the mnemonic: “Sync blocks, async frees the queue.”
SNOW-CAD Platform Features and Integration Practice Question
This SNOW-CAD practice question tests your understanding of platform features and integration. 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.
A company has developed a custom Scripted REST API endpoint that processes incoming orders and then makes synchronous outbound REST calls to an external shipping system for validation. During testing with low concurrency, the endpoint works correctly. However, in production with high concurrency, the endpoint frequently times out and returns 504 errors to the caller. The performance team has confirmed that the external shipping system is responsive and the network latency is acceptable. Which course of action should the development team take to resolve the timeout issue?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Refactor the script to make asynchronous HTTP requests and process the shipping validation response using a separate queue or business rule.
The synchronous HTTP request blocks the script until the response is received. With high concurrency, this leads to thread starvation and timeouts. The best solution is to use asynchronous HTTP requests and handle the response via a queue or event mechanism, freeing the script to process other requests.
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.
- ✗
Deploy additional MID Servers to distribute the outbound call load.
- ✗
Implement a caching layer to store shipping validation results and avoid repeated calls to the external system.
Why it's wrong here
Caching may reduce calls but does not help when a call is made and the synchronous request blocks; the timeout still occurs.
- ✗
Increase the timeout value in the outbound REST Message record to accommodate peak loads.
Why it's wrong here
Increasing timeout may delay the failure but does not address the underlying thread starvation issue; it may make the problem worse.
- ✓
Refactor the script to make asynchronous HTTP requests and process the shipping validation response using a separate queue or business rule.
Why this is correct
Asynchronous requests free the script while waiting for the external response, allowing the instance to handle more concurrent requests without blocking.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 practitioner preparing for the SNOW-CAD exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which SNOW-CAD exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Platform Features and Integration — study guide chapter
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FAQ
Questions learners often ask
What does this SNOW-CAD question test?
Platform Features and Integration — This question tests Platform Features and Integration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Refactor the script to make asynchronous HTTP requests and process the shipping validation response using a separate queue or business rule. — The synchronous HTTP request blocks the script until the response is received. With high concurrency, this leads to thread starvation and timeouts. The best solution is to use asynchronous HTTP requests and handle the response via a queue or event mechanism, freeing the script to process other requests.
What should I do if I get this SNOW-CAD question wrong?
Identify which SNOW-CAD exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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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