Question 798 of 302
SAA-C03 Design Resilient Architectures Practice Question
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 design must avoid adding custom operational scripts.
⚠ Common exam trap
Test-takers frequently assume Route 53 alone is sufficient, forgetting that the secondary Region must have a fully deployed and running application stack to receive traffic after failover.
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
✓
Route 53 failover routing with health checks
Route 53 failover routing with health checks is required because it automatically directs traffic away from an unhealthy primary endpoint to a secondary endpoint, enabling cross-region failover without custom scripts. A deployed standby application stack in the secondary Region is necessary to serve traffic when the primary fails, as Route 53 can only route to healthy endpoints that are actually running.
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.
- ✗
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.
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Last reviewed: Jun 11, 2026
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