Top 10 AWS Route 53 Interview Questions: Prepare for Success

I can provide you with the top 10 AWS Route 53 interview questions and answers. Route 53 is a scalable and highly available Domain Name System (DNS) web service offered by AWS. Here are some commonly asked questions and their answers:

1. Q: What is Route 53?
   A: Route 53 is a scalable DNS web service provided by AWS. It enables domain registration, routing of incoming traffic to AWS resources, and health checking of resources for availability.

2. Q: How does Route 53 support domain registration?
   A: Route 53 allows you to register new domains, transfer existing domains, or manage existing domains registered with other domain registrars.

3. Q: What are the routing policies available in Route 53?
   A: Route 53 offers several routing policies, including Simple, Weighted, Latency-based, Failover, Geolocation, and Multivalue Answer. These policies allow you to control how traffic is routed to your resources based on different criteria.

4. Q: How does Route 53 handle DNS resolution for global applications?
   A: Route 53 uses global anycast routing to direct DNS requests to the nearest AWS data center, resulting in reduced latency and improved performance for global applications.

5. Q: How can you use Route 53 for health checking of resources?
   A: Route 53 can periodically send health checks to your resources, such as web servers, and route traffic only to healthy resources. It helps ensure high availability and reliability of your applications.

6. Q: Can you explain the difference between Alias and CNAME records in Route 53?
   A: Alias records are used to map your domain to AWS resources, such as an Elastic Load Balancer or S3 bucket, while CNAME records are used to map your domain to a specific hostname.

7. Q: How can you redirect traffic from one domain to another using Route 53?
   A: You can set up a Route 53 alias record with a routing policy of "Simple" and specify the target domain you want to redirect traffic to.

8. Q: What is a hosted zone in Route 53?
   A: A hosted zone is a collection of DNS records that define how traffic is routed for a specific domain. It contains information about the domain and its subdomains.

9. Q: How can you configure a subdomain in Route 53?
   A: To configure a subdomain, you need to create a new hosted zone for the subdomain and add the necessary DNS records, such as A or CNAME records, to map the subdomain to the desired resources.

10. Q: How does Route 53 integrate with other AWS services?
    A: Route 53 integrates seamlessly with various AWS services. For example, you can use Route 53 to route traffic to an Elastic Load Balancer, Amazon S3 bucket, AWS CloudFront distribution, or an Amazon EC2 instance.

Remember, these are just sample questions, and it's essential to have a comprehensive understanding of Route 53 concepts, features, and best practices before appearing for an interview.