The correct answer is to reduce the batch size to 50 records and add a 1-second delay between consecutive REST calls. This design change directly addresses the HTTP 429 errors by ensuring that each batch of requests stays well within the external system’s rate limit of 100 requests per minute, while the deliberate delay prevents the burst of traffic that triggers the rate limiting mechanism. On the ServiceNow Certified Application Developer CAD exam, this scenario tests your understanding of how to handle rate limit errors in scheduled REST imports, a common integration challenge where reducing batch size and adding delay is the preferred pattern over simply retrying or increasing timeout values. A common trap is to assume that retrying the failed request alone will fix the issue, but without reducing the batch size, the same burst will continue to trigger 429 errors. Memory tip: think “50 and 1” — 50 records per call and 1 second of patience keeps the rate limit happy.
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 ServiceNow instance integrates with an external inventory system via a scheduled REST import job. Recently, the import started failing intermittently with HTTP 429 (Too Many Requests) errors. The external system enforces a rate limit of 100 requests per minute. The existing job pulls 1500 records at a time using a single REST message. Which design change would best resolve this issue while ensuring the import completes successfully?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Reduce the batch size to 50 records and add a 1-second delay between consecutive REST calls
Option A is correct because reducing the batch size to 50 records ensures that each REST call stays within the external system's rate limit of 100 requests per minute. Adding a 1-second delay between consecutive calls further prevents bursts that could trigger HTTP 429 errors, while still allowing the import to complete by making multiple smaller requests over time.
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.
✓
Reduce the batch size to 50 records and add a 1-second delay between consecutive REST calls
Why this is correct
This stays within the 100 requests/min limit (50 requests with 1s delay = 50 requests/min) and ensures all data is imported.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the number of threads in the import set table loader to process records faster
Why it's wrong here
More threads would send more concurrent requests, likely increasing 429 errors.
✗
Increase the batch size to 5000 records per request to reduce the number of calls
Why it's wrong here
Larger batch size may cause timeout or still exceed the per-min rate if requests are sent quickly.
✗
Switch the REST message to use Basic Authentication instead of OAuth to reduce overhead
Why it's wrong here
Authentication method does not affect rate limits.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume increasing batch size or thread count will improve throughput, but in rate-limited scenarios, reducing concurrency and pacing requests is the correct approach to avoid HTTP 429 errors.
Detailed technical explanation
How to think about this question
HTTP 429 errors are governed by the RFC 6585 specification, which defines the 'Retry-After' header to indicate how long to wait before retrying. In ServiceNow, RESTMessageV2 supports custom headers and delays via scripted calls, allowing precise control over request pacing. A real-world scenario might involve an external API that enforces a sliding window rate limit, where even a single burst of 100 requests in a short period can trigger a 429, making a 1-second delay a safe buffer.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: Reduce the batch size to 50 records and add a 1-second delay between consecutive REST calls — Option A is correct because reducing the batch size to 50 records ensures that each REST call stays within the external system's rate limit of 100 requests per minute. Adding a 1-second delay between consecutive calls further prevents bursts that could trigger HTTP 429 errors, while still allowing the import to complete by making multiple smaller requests over time.
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: "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.
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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