SOA-C02 Question #170: Real Exam Question with Answer & Explanation

Question

A SysOps administrator is using AWS Compute Optimizer to get recommendations for a fleet of Amazon EC2 instances. After the analysis is complete, some of the EC2 instances are missing from the Compute Optimizer dashboard. What is the cause of this issue?

Options

• AThe missing instances do not have the Amazon CloudWatch agent installed.
• BCompute Optimizer does not support the instance types of the missing instances.
• CCompute Optimizer already considers the missing instances to be optimized.
• DThe missing instances are running a Windows operating system.

Explanation

Why A is correct: AWS Compute Optimizer requires the Amazon CloudWatch agent to be installed on EC2 instances to collect memory utilization metrics. Without it, Compute Optimizer lacks sufficient data to generate recommendations, so those instances simply don't appear in the dashboard.

Why the distractors are wrong:

• B is incorrect - Compute Optimizer supports a wide range of instance types and doesn't silently drop unsupported ones; it would flag them differently.
• C is incorrect - already-optimized instances still appear in the dashboard; they just show no recommended changes.
• D is incorrect - Compute Optimizer supports both Linux and Windows instances.

Memory tip: Think of it this way - Compute Optimizer needs memory data to do its job, and memory metrics require the CloudWatch agent. No agent = no memory metrics = no recommendation = no entry in the dashboard. "No agent, no appearance."

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