- A
The health check for one region is failing, causing all traffic to be routed to the remaining healthy region.
If a region fails health check, traffic is routed to healthy regions, increasing latency for users far from that region.
- B
The company should use geolocation routing instead of latency-based routing.
Why wrong: Geolocation routing is not required; latency-based routing works for multi-region active-active.
- C
The latency records are not refreshed frequently enough, causing stale routing decisions.
Why wrong: Latency records are updated dynamically per query.
- D
The Route 53 health check is configured to use CloudWatch alarms, which introduced additional latency.
Why wrong: Health checks use Route 53 health checkers, not CloudWatch alarms directly.
ANS-C01 Network Design Practice Question
This ANS-C01 practice question tests your understanding of network design. 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 is designing a multi-region active-active application using Amazon Route 53 latency-based routing with health checks. The application is deployed in us-east-1 and eu-west-1. During a load test, users in South America experience high latency despite the Route 53 configuration. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
The health check for one region is failing, causing all traffic to be routed to the remaining healthy region.
Option D is correct because latency-based routing selects the region with the lowest latency for the user, but if the health check fails for one region, Route 53 routes traffic to the other region regardless of latency. Option A is wrong because latency-based routing does not require geolocation routing. Option B is wrong because health checks use Route 53 health checkers, not CloudWatch. Option C is wrong because latency records are evaluated per query and do not cause all traffic to go to one region.
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.
- ✓
The health check for one region is failing, causing all traffic to be routed to the remaining healthy region.
Why this is correct
If a region fails health check, traffic is routed to healthy regions, increasing latency for users far from that region.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The company should use geolocation routing instead of latency-based routing.
Why it's wrong here
Geolocation routing is not required; latency-based routing works for multi-region active-active.
- ✗
The latency records are not refreshed frequently enough, causing stale routing decisions.
Why it's wrong here
Latency records are updated dynamically per query.
- ✗
The Route 53 health check is configured to use CloudWatch alarms, which introduced additional latency.
Why it's wrong here
Health checks use Route 53 health checkers, not CloudWatch alarms directly.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which ANS-C01 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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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The health check for one region is failing, causing all traffic to be routed to the remaining healthy region. — Option D is correct because latency-based routing selects the region with the lowest latency for the user, but if the health check fails for one region, Route 53 routes traffic to the other region regardless of latency. Option A is wrong because latency-based routing does not require geolocation routing. Option B is wrong because health checks use Route 53 health checkers, not CloudWatch. Option C is wrong because latency records are evaluated per query and do not cause all traffic to go to one region.
What should I do if I get this ANS-C01 question wrong?
Identify which ANS-C01 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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 20, 2026
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services 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 ANS-C01 exam.
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