A company has deployed a web application to Amazon EC2 instances. The EC2 instances have low usage. Which AWS service or feature should the company use to rightsize the EC2 instances?

Question

Options

• AAWS Config
• BAWS Cost Anomaly Detection
• CAWS Budgets
• DAWS Compute Optimizer

• A
  8% (3)
• B
  3% (1)
• C
  3% (1)
• D
  86% (32)

Explanation

AWS Compute Optimizer is the right choice because it analyzes historical utilization metrics of your EC2 instances (CPU, memory, network) and provides specific, actionable recommendations to rightsize resources - meaning it tells you whether to scale up, scale down, or change instance types to optimize performance and cost.

Why the distractors are wrong:

• AWS Config (A) tracks configuration changes and compliance of AWS resources but does not provide cost optimization or rightsizing recommendations.
• AWS Cost Anomaly Detection (B) uses machine learning to detect unexpected spending spikes, but it identifies anomalies, not rightsizing opportunities for underutilized instances.
• AWS Budgets (C) helps you set spending thresholds and receive alerts when costs exceed limits, but it does not analyze or recommend changes to instance sizes.

Memory Tip: Think of Compute Optimizer as your fitness coach for EC2 - it studies how hard your instances are "working out" and tells you if they're over- or under-powered for the job. If something is about rightsizing or resource efficiency recommendations, Compute Optimizer is almost always the answer on the exam.

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