This ANS-C01 practice question tests your understanding of network design. 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 company is building a serverless application using API Gateway, Lambda, and DynamoDB. The API must be accessible from the internet and be resilient to Regional failures. Which design provides the HIGHEST availability?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy in two Regions with API Gateway, Lambda, and DynamoDB global tables. Use Route 53 failover routing with health checks.
Option B is correct because using a custom domain with Route 53 failover routing to API Gateway in two regions provides regional failover. Option A is wrong because a single region is not resilient. Option C is wrong because CloudFront does not provide active-active for API Gateway across regions. Option D is wrong because Global Accelerator does not support API Gateway as an endpoint.
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 in two Regions with API Gateway, Lambda, and DynamoDB global tables. Use Route 53 failover routing with health checks.
Why this is correct
Active-passive failover across regions provides highest availability.
Related concept
Read the scenario before looking for a memorised answer.
✗
Deploy API Gateway, Lambda, and DynamoDB in a single Region with multi-AZ.
Why it's wrong here
Multi-AZ provides availability within a region but not against regional failure.
✗
Deploy API Gateway in two Regions behind a Global Accelerator accelerator.
Why it's wrong here
Global Accelerator supports ALB, NLB, and EC2, not API Gateway directly.
✗
Use a single API Gateway with CloudFront distribution in front, and Lambda@Edge for compute.
Why it's wrong here
CloudFront with Lambda@Edge does not replicate the entire backend.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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.
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: Deploy in two Regions with API Gateway, Lambda, and DynamoDB global tables. Use Route 53 failover routing with health checks. — Option B is correct because using a custom domain with Route 53 failover routing to API Gateway in two regions provides regional failover. Option A is wrong because a single region is not resilient. Option C is wrong because CloudFront does not provide active-active for API Gateway across regions. Option D is wrong because Global Accelerator does not support API Gateway as an endpoint.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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.
Question Discussion
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