The answer is rightsizing instances based on utilization metrics and using Spot Instances for fault-tolerant workloads. Rightsizing ensures you match instance capacity to actual demand, eliminating waste from over-provisioned resources, while Spot Instances can reduce compute costs by up to 90% by leveraging spare AWS capacity for workloads that can tolerate interruptions. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your ability to distinguish between true cost-saving strategies and common traps like Dedicated Hosts or increasing IOPS, which only add expense. A frequent pitfall is confusing cost optimization with performance enhancement—remember that adding features like provisioned IOPS or dedicated tenancy always increases cost. For a quick memory tip: think “Right size and spot the savings” to recall that utilization metrics guide sizing, and Spot Instances slash costs for flexible tasks.
SOA-C02 Cost and Performance Optimization Practice Question
This SOA-C02 practice question tests your understanding of cost and performance optimization. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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 wants to optimize costs for its Amazon EC2 instances. Which TWO strategies are effective for reducing costs?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Spot Instances for fault-tolerant workloads.
Using Spot Instances for fault-tolerant workloads can reduce costs significantly (up to 90%). Rightsizing instances ensures you are not paying for unused capacity. Dedicated Hosts increase costs. Increasing provisioned IOPS increases costs. Using EBS General Purpose SSD (gp3) is cost-effective but not a primary cost reduction strategy.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Use Spot Instances for fault-tolerant workloads.
Why this is correct
Spot Instances offer substantial discounts.
Related concept
Read the scenario before looking for a memorised answer.
✓
Rightsize instances based on utilization metrics.
Why this is correct
Rightsizing eliminates over-provisioning.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the provisioned IOPS for EBS volumes.
Why it's wrong here
Increasing IOPS increases cost.
✗
Use EBS General Purpose SSD (gp2) volumes instead of gp3.
Why it's wrong here
gp3 is generally more cost-effective than gp2.
✗
Use Dedicated Hosts to meet compliance requirements.
Why it's wrong here
Dedicated Hosts are more expensive.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Cost and Performance Optimization — This question tests Cost and Performance Optimization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Spot Instances for fault-tolerant workloads. — Using Spot Instances for fault-tolerant workloads can reduce costs significantly (up to 90%). Rightsizing instances ensures you are not paying for unused capacity. Dedicated Hosts increase costs. Increasing provisioned IOPS increases costs. Using EBS General Purpose SSD (gp3) is cost-effective but not a primary cost reduction strategy.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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.
Question Discussion
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