AWS Certified Advanced Networking – Specialty (ANS-C00) — Question 33

You are building an application in AWS that requires Amazon Elastic MapReduce (Amazon EMR). The application needs to resolve hostnames in your internal, on-premises Active Directory domain. You update your DHCP Options Set in the VPC to point to a pair of Active Directory integrated DNS servers running in your
VPC.
Which action is required to support a successful Amazon EMR cluster launch?

Answer options

• A. Add a conditional forwarder to the Amazon-provided DNS server.
• B. Enable seamless domain join for the Amazon EMR cluster.
• C. Launch an AD connector for the internal domain.
• D. Configure an Amazon Route 53 private zone for the EMR cluster.

Correct answer: A

Explanation

The correct answer is A because adding a conditional forwarder to the Amazon-provided DNS server allows the EMR cluster to resolve names in the on-premises Active Directory domain. Options B and C are not necessary for this scenario, and option D pertains to a different DNS resolution method that is not required for the cluster to function with the existing Active Directory DNS setup.