A Route 53 health check marks an endpoint unhealthy. What does Route 53 do with the DNS record?
Show answer and explanation
Answer: A
Route 53 evaluates the health check and removes an unhealthy record from its answers, so with failover routing the secondary record is returned instead. For a simple record with no alternative, queries for the name fail until the endpoint passes its checks again.
Health checks are a DNS-level signal only; they never change the state of the resource behind the record.
Why the other options are wrong
- B. Route 53 does not manage instance lifecycle; only an Auto Scaling group or an operator can replace the instance.
- C. Target group health is decided by the load balancer's own health checks, not by Route 53.
- D. CloudFront caching is controlled by cache behaviors and invalidations, not by Route 53 health status.