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AWS Certified Solutions Architect - Associate · AWS
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Correct me if I'm wrong but CloudFront DOES NOT have health check capabilities out of the box. Route 53 and Global Accelerator do.
A for sure
B: Caching solution. Not ideal for failover although it will work. Would have been a correct answer if A wasn't an option C: Transit gateway is for VPC connectivity not AWS API or Lambda D: Even if it was possible, there is a primary region dependency of ALB A: correct because R53 health checks can failover across regions Good explanation here: https://aws.amazon.com/blogs/compute/building-a-multi-region-serverless-application-with-amazon-api-gateway-and-aws-lambda/