The correct solution is to use AWS Organizations with consolidated billing and purchase Reserved Instances in the management account to share with all accounts. This works because consolidated billing aggregates usage across all linked accounts, allowing the hourly cost and capacity benefits of any Reserved Instance purchased in the management account to apply automatically to matching instances in any member account, regardless of which account launched them. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of how to centralize Reserved Instance purchases for cost optimization across a multi-account environment, a common real-world requirement. A frequent trap is confusing this with the EC2 Reserved Instance Marketplace, which is only for selling unused reservations, or with AWS Budgets, which tracks spending but cannot purchase or share reservations. Remember the key principle: to centralize Reserved Instance purchases, always consolidate billing first, then buy in the management account—think of it as “one account buys, all accounts save.”
SAP-C02 Practice Question: Design Solutions for Organizational Complexity
This SAP-C02 practice question tests your understanding of design solutions for organizational complexity. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 has multiple AWS accounts for different departments. The finance team wants to centrally manage and optimize EC2 Reserved Instance purchases across all accounts. Which solution should the company implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS Organizations with consolidated billing and purchase Reserved Instances in the management account to share with all accounts.
Option D is correct because AWS Organizations allows you to consolidate billing and share Reserved Instance discounts across all accounts. Option A is wrong because each account would need to purchase separately, losing optimization. Option B is wrong because EC2 Reserved Instance Marketplace is for selling unused reservations. Option C is wrong because AWS Budgets is for cost tracking, not purchasing.
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 AWS Organizations with consolidated billing and purchase Reserved Instances in the management account to share with all accounts.
Why this is correct
Reserved Instances are shared across all accounts in the consolidated billing family.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use AWS Budgets to monitor usage and then purchase Reserved Instances per account.
Why it's wrong here
Budgets do not purchase; each account still needs own purchase.
✗
Purchase Reserved Instances in the EC2 Reserved Instance Marketplace for distribution to accounts.
Why it's wrong here
Marketplace is for selling, not centralized purchasing.
✗
Have each account purchase its own Reserved Instances based on its usage.
Why it's wrong here
No optimization across accounts.
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 SAP-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.
Design Solutions for Organizational Complexity — This question tests Design Solutions for Organizational Complexity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS Organizations with consolidated billing and purchase Reserved Instances in the management account to share with all accounts. — Option D is correct because AWS Organizations allows you to consolidate billing and share Reserved Instance discounts across all accounts. Option A is wrong because each account would need to purchase separately, losing optimization. Option B is wrong because EC2 Reserved Instance Marketplace is for selling unused reservations. Option C is wrong because AWS Budgets is for cost tracking, not purchasing.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-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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Question Discussion
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