SOA-C02 Question #308: Real Exam Question with Answer & Explanation

Question

A company has a simple web application that runs on a set of Amazon EC2 instances behind an Elastic Load Balancer in the eu-west-2 Region. Amazon Route 53 holds a DNS record for the application with a simple touting policy. Users from all over the world access the application through their web browsers. The company needs to create additional copies of the application in the us-east-1 Region and in the ap-south-1 Region. The company must direct users to the Region that provides the fastest response times when the users load the application. What should a SysOps administrator do to meet these requirements?

Options

• AIn each new Region, create a new Elastic Load Balancer and a new set of EC2 Instances to
• BIn each new Region, create a copy of the application on new EC2 instances.
• CIn each new Region, create a copy of the application on new EC2 instances.
• DIn each new Region, create a new Elastic Load Balancer and a new set of EC2 instances to

Explanation

Option D is correct because it combines creating an Elastic Load Balancer with EC2 instances in each new region and updates Route 53 to use a latency-based routing policy, which automatically directs each user to whichever region offers the lowest network latency - giving the fastest response times.

Options B and C are wrong because they deploy EC2 instances without an ELB, meaning the application lacks a proper, scalable entry point in each region; Route 53 latency routing requires a routable endpoint per region, typically an ELB or similar resource. Option A likely pairs the ELB + EC2 setup with the wrong Route 53 policy - such as geolocation or geoproximity routing - which routes based on where users are physically located, not which region actually responds fastest (latency and geography don't always align).

Memory tip: "Fastest response = Latency routing." When an exam question says fastest or lowest latency, immediately think Route 53 Latency Routing Policy - not Geolocation (which is for serving region-specific content) and not Geoproximity (which is for shifting traffic by distance bias). The phrase "fastest response times" is the exam's signal word for latency-based routing.

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