- A
Use a failover routing policy for the DNS record.
Failover routing is specifically designed for primary and secondary endpoints. Route 53 returns the secondary record when the primary record is considered unhealthy.
- B
Configure a health check for the primary endpoint.
Route 53 must have health information to determine whether the primary endpoint is available. The health check is what tells Route 53 to stop returning the primary record and serve the secondary one instead.
- C
Use geolocation routing so users are always sent to the closest Region.
Why wrong: Geolocation routing chooses answers by the user's location, not by endpoint health. It does not provide automatic primary-to-secondary failover based on an outage.
- D
Use a private hosted zone to expose the API to the internet.
Why wrong: Private hosted zones are only resolvable from associated VPCs and are not the right mechanism for public DNS failover between Regions.
- E
Set the TTL to zero and skip health checks to make failover faster.
Why wrong: A lower TTL can reduce client-side caching time, but it does not detect failures or direct traffic to a backup Region by itself. Without health checks, Route 53 has no signal that the primary is unhealthy.
SAA-C03 Design Resilient Architectures Practice Question
This SAA-C03 practice question tests your understanding of design resilient architectures. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 hosts an internal API in two AWS Regions. Traffic must automatically switch to the secondary Region when the primary Region's endpoint is unhealthy. Which two Route 53 settings are required? Select two.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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
Use a failover routing policy for the DNS record.
A failover routing policy is required because it allows Route 53 to automatically route traffic from a primary resource to a secondary resource when the primary is unhealthy. This is the only routing policy that supports active-passive failover across two AWS Regions. Without this policy, Route 53 would not know which endpoint to consider primary or how to switch traffic upon failure.
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.
- ✓
Use a failover routing policy for the DNS record.
Why this is correct
Failover routing is specifically designed for primary and secondary endpoints. Route 53 returns the secondary record when the primary record is considered unhealthy.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Configure a health check for the primary endpoint.
Why this is correct
Route 53 must have health information to determine whether the primary endpoint is available. The health check is what tells Route 53 to stop returning the primary record and serve the secondary one instead.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use geolocation routing so users are always sent to the closest Region.
Why it's wrong here
Geolocation routing chooses answers by the user's location, not by endpoint health. It does not provide automatic primary-to-secondary failover based on an outage.
- ✗
Use a private hosted zone to expose the API to the internet.
Why it's wrong here
Private hosted zones are only resolvable from associated VPCs and are not the right mechanism for public DNS failover between Regions.
- ✗
Set the TTL to zero and skip health checks to make failover faster.
Why it's wrong here
A lower TTL can reduce client-side caching time, but it does not detect failures or direct traffic to a backup Region by itself. Without health checks, Route 53 has no signal that the primary is unhealthy.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse failover routing with geolocation routing, thinking geographic proximity is sufficient for disaster recovery, but failover routing is the only policy that provides automatic health-based switching between primary and secondary endpoints.
Detailed technical explanation
How to think about this question
Route 53 failover routing works with health checks that monitor the primary endpoint using HTTP, HTTPS, or TCP probes. When the health check fails, Route 53 automatically returns the secondary resource's IP address in DNS responses, respecting the TTL of the record. In a real-world scenario, you would also configure the secondary endpoint's health check to ensure it is healthy before routing traffic to it, and you might use a weighted routing policy for more granular traffic distribution.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Resilient Architectures — This question tests Design Resilient Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a failover routing policy for the DNS record. — A failover routing policy is required because it allows Route 53 to automatically route traffic from a primary resource to a secondary resource when the primary is unhealthy. This is the only routing policy that supports active-passive failover across two AWS Regions. Without this policy, Route 53 would not know which endpoint to consider primary or how to switch traffic upon failure.
What should I do if I get this SAA-C03 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: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This SAA-C03 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 SAA-C03 exam.
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