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Cost and Performance Optimization →hardMultiple ChoiceObjective-mapped

SOA-C02 Reserved Instance (RI) utilization Practice Question

This SOA-C02 practice question tests your understanding of cost and performance optimization. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: reserved Instance (RI) utilization. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

A company has a production environment with multiple EC2 instances. They want to ensure that all instances are covered by a Reserved Instance (RI) to maximize cost savings. Which AWS service can automatically apply unused RIs to new instances?

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

AWS Cost Explorer

None of the listed services automatically apply unused Reserved Instances (RIs) to new instances. The application of unused RIs is handled automatically by AWS billing. AWS Cost Explorer provides RI utilization reports and recommendations, but does not apply RIs. AWS Systems Manager manages operational tasks, AWS Trusted Advisor offers best practice checks, and AWS Config evaluates resource configurations. None of these services perform automatic RI application.

Key principle: Reserved Instance (RI) utilization

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    AWS Systems Manager

    Why it's wrong here

    Systems Manager manages instances, not RI application.

  • ✗

    AWS Trusted Advisor

    Why it's wrong here

    Trusted Advisor provides RI recommendations, not automatic application.

  • ✗

    AWS Config

    Why it's wrong here

    AWS Config evaluates resource configurations, not RI application.

  • ✓

    AWS Cost Explorer

    Why this is correct

    Cost Explorer provides RI utilization reports, but RIs are automatically applied by AWS billing.

    Related concept

    Reserved Instance (RI) utilization

Common exam traps

Common exam trap: answer the scenario, not the keyword

Candidates often assume AWS Cost Explorer automatically applies RIs because it provides RI recommendations. However, Cost Explorer only reports on usage and recommendations; the actual application is automatic via AWS billing.

Detailed technical explanation

How to think about this question

Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.

KKey Concepts to Remember

  • Reserved Instance (RI) utilization
  • AWS Cost Explorer

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Reserved Instance (RI) utilization

Real-world example

How this comes up in practice

A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.

What to study next

Got this wrong? Here's your next step.

Review reserved Instance (RI) utilization, then practise related SOA-C02 questions on the same topic to reinforce the concept.

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FAQ

Questions learners often ask

What does this SOA-C02 question test?

Cost and Performance Optimization — This question tests Cost and Performance Optimization — Reserved Instance (RI) utilization.

What is the correct answer to this question?

The correct answer is: AWS Cost Explorer — None of the listed services automatically apply unused Reserved Instances (RIs) to new instances. The application of unused RIs is handled automatically by AWS billing. AWS Cost Explorer provides RI utilization reports and recommendations, but does not apply RIs. AWS Systems Manager manages operational tasks, AWS Trusted Advisor offers best practice checks, and AWS Config evaluates resource configurations. None of these services perform automatic RI application.

What should I do if I get this SOA-C02 question wrong?

Review reserved Instance (RI) utilization, then practise related SOA-C02 questions on the same topic to reinforce the concept.

What is the key concept behind this question?

Reserved Instance (RI) utilization

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Last reviewed: Jun 20, 2026

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This SOA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SOA-C02 exam.