SAA-C03 Design Resilient Architectures Practice Question
This SAA-C03 practice question tests your understanding of design resilient architectures. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: route 53 failover routing automatically redirects traffic based on endpoint health.. 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 regional web application for a content publishing system must fail over automatically to a secondary Region if the primary endpoint becomes unhealthy. Which two services or features are required? The architecture review board prefers a managed AWS-native control.
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Route 53 failover routing with health checks
Route 53 failover routing with health checks (Option B) is required because it monitors the primary endpoint's health and automatically reroutes traffic to a secondary Region when the primary becomes unhealthy. This is the managed AWS-native control for DNS-based failover, meeting the architecture review board's preference.
Key principle: Route 53 failover routing automatically redirects traffic based on endpoint health.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
AWS Organizations service control policies
Why it's wrong here
SCPs enforce permissions and do not provide regional failover.
✓
Route 53 failover routing with health checks
Why this is correct
Route 53 can monitor endpoint health and return the standby endpoint when the primary is unhealthy.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Route 53 failover routing automatically redirects traffic based on endpoint health.
✗
S3 Transfer Acceleration
Why it's wrong here
Transfer Acceleration improves upload paths to S3 but does not provide application failover.
✓
A deployed standby application stack in the secondary Region
Why this is correct
DNS failover requires a working target in the secondary Region.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Route 53 failover routing automatically redirects traffic based on endpoint health.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think DNS failover alone is sufficient, forgetting that you must also have a running application stack in the secondary Region to receive traffic after failover.
Detailed technical explanation
How to think about this question
Route 53 failover routing works by associating a health check with a DNS record; when the health check fails (e.g., HTTP 5xx or TCP timeout), Route 53 automatically returns the secondary record's IP. The health check interval can be as low as 10 seconds with a 3 consecutive failure threshold, enabling sub-minute failover. A deployed standby application stack in the secondary Region (Option D) is also required because Route 53 can only route to healthy endpoints; without a pre-provisioned stack, there is no target to fail over to.
KKey Concepts to Remember
Route 53 failover routing automatically redirects traffic based on endpoint health.
Health checks monitor the availability and performance of application endpoints.
Failover routing policies can be configured for active/passive or active/active multi-Region setups.
Route 53 provides a managed, DNS-based solution for disaster recovery.
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
Route 53 failover routing automatically redirects traffic based on endpoint health.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review route 53 failover routing automatically redirects traffic based on endpoint health., then practise related SAA-C03 questions on the same topic to reinforce the concept.
Design Resilient Architectures — This question tests Design Resilient Architectures — Route 53 failover routing automatically redirects traffic based on endpoint health..
What is the correct answer to this question?
The correct answer is: Route 53 failover routing with health checks — Route 53 failover routing with health checks (Option B) is required because it monitors the primary endpoint's health and automatically reroutes traffic to a secondary Region when the primary becomes unhealthy. This is the managed AWS-native control for DNS-based failover, meeting the architecture review board's preference.
What should I do if I get this SAA-C03 question wrong?
Review route 53 failover routing automatically redirects traffic based on endpoint health., then practise related SAA-C03 questions on the same topic to reinforce the concept.
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?
Route 53 failover routing automatically redirects traffic based on endpoint health.
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Question Discussion
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