All 7 Amazon Route 53 & DNS Management questions
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What is Amazon Route 53 and what is its primary purpose? What are the common DNS record types supported by Route 53, such as A, CNAME, and MX records? What is a Route 53 alias record, and how is it different from a standard CNAME record? What are Route 53 health checks, and how do they support failover routing? How does Route 53 Resolver enable DNS resolution between a VPC and on premises networks? What is DNSSEC, and how does Route 53 support it to protect against DNS spoofing?
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How do Route 53 routing policies, such as weighted and latency based routing, affect how traffic is directed?

Intermediate

Answer

Route 53 supports several routing policies beyond simple one to one mapping, including weighted routing which lets you split traffic between multiple resources based on assigned percentages, useful for gradual rollouts, and latency based routing which automatically directs users to the AWS region that provides the lowest network latency for their specific location, improving performance for globally distributed applications.
aws route53 change-resource-record-sets --hosted-zone-id ABC123 --change-batch '{"Changes":[{"Action":"CREATE","ResourceRecordSet":{"Name":"app.example.com","Type":"A","SetIdentifier":"version-2","Weight":10,"TTL":60,"ResourceRecords":[{"Value":"192.0.2.2"}]}}]}'
Real-world example A software company uses weighted routing to send only ten percent of traffic to a newly deployed version of its application, gradually increasing that percentage as confidence in the new version grows.

Common follow-ups: What is the difference between latency based routing and geolocation routing?;How does failover routing work alongside health checks?

Elastic Load Balancing (ALB NLB & CLB);Auto Scaling Groups
All 7 Amazon Route 53 & DNS Management questions