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 is using Amazon RDS for MySQL with Multi-AZ deployment. They want to optimize costs while maintaining high availability. Which TWO actions should the SysOps administrator take?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Purchase Reserved Instances for the database instance.
Option A is correct because reserved instances offer significant discounts. Option C is correct because rightsizing to a smaller instance reduces cost if the current instance is over-provisioned. Option B is wrong because removing Multi-AZ sacrifices high availability. Option D is wrong because moving to a single-AZ also sacrifices availability. Option E is wrong because enabling auto scaling is not a feature of RDS for cost optimization.
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.
✓
Purchase Reserved Instances for the database instance.
Why this is correct
Reserved Instances provide a discount for a 1- or 3-year commitment.
Related concept
Read the scenario before looking for a memorised answer.
✗
Remove Multi-AZ to reduce costs.
Why it's wrong here
Removing Multi-AZ reduces availability.
✗
Enable auto scaling for the RDS instance to handle variable load.
Why it's wrong here
RDS does not support auto scaling for instance size; it supports storage auto scaling.
✓
Review the instance size and downsize if it is over-provisioned.
Why this is correct
Rightsizing reduces cost without affecting availability if done correctly.
Related concept
Read the scenario before looking for a memorised answer.
✗
Move to a single-AZ deployment and take snapshots for recovery.
Why it's wrong here
Single-AZ does not provide high availability.
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: Purchase Reserved Instances for the database instance. — Option A is correct because reserved instances offer significant discounts. Option C is correct because rightsizing to a smaller instance reduces cost if the current instance is over-provisioned. Option B is wrong because removing Multi-AZ sacrifices high availability. Option D is wrong because moving to a single-AZ also sacrifices availability. Option E is wrong because enabling auto scaling is not a feature of RDS for cost optimization.
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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