You created three S3 buckets – “mydomain.com” ( root domain ), “downloads.mydomain.com” ( subdomain ), and “www.mydomain.com” ( subdomain ). You uploaded your files ( including the "index.html" and "error.html" files ), enabled static website hosting, specified both of the default documents under the “enable static website hosting” header, and set the “Make Public” permission for the objects in each of the three buckets. After creating Route 53 Aliases for the three buckets, you will have your end-users test your websites by browsing to http://mydomain.com/error.html, http://downloads.mydomain.com/index.html, and http://www.mydomain.com. What problems will your testers encounter?

Answer options:

A.http://mydomain.com/error.html will not work because you did not set a value for the error.html file.
B.http://www.mydomain.com will not work because the URL does not include a file name at the end of it.
C.There will be no problems, all three sites should work.
D.http://downloads.mydomain.com/index.html will not work because the “downloads” prefix is not a supported prefix for S3 websites using Route 53 aliases.

Answer – C
Previously we are only allowed domain prefix, when creating AWS Route53 aliases for AWS S3 static websites was the “www”.
However, this is no longer the case. You can now use other sub-domains.
For more information on S3 web site hosting, please visit the below link-
http://docs.aws.amazon.com/AmazonS3/latest/dev/WebsiteHosting.html