The answer is to define and enforce a tagging strategy using AWS Organizations tag policies, enable RI discount sharing from the management account, and activate the consolidated billing data in Cost Explorer. These three steps work together to achieve detailed cost allocation across accounts using tags and RI sharing, because tag policies ensure consistent tagging across all department accounts, while enabling RI discount sharing allows Reserved Instance discounts to be applied proportionally across the entire organization rather than being locked to a single purchasing account. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of how cost allocation requires both governance (tag policies) and financial optimization (RI sharing) to prevent skewed department-level reports. A common trap is forgetting that RI sharing must be explicitly enabled in the management account, as it is not automatic. Memory tip: think “Tags for tracking, RI sharing for fairness” to remember that accurate cost allocation needs both consistent labeling and shared savings.
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 a consolidated billing setup with AWS Organizations. The finance team needs to track costs at the department level. Each department has its own AWS account. Which THREE steps should be taken to achieve detailed cost allocation? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable the RI discount sharing feature in the management account.
Option B is correct because enabling RI discount sharing in the management account allows all accounts in the AWS Organization to benefit from Reserved Instance discounts, which is essential for accurate cost allocation across departments. Without this, RI discounts would only apply to the purchasing account, skewing department-level cost tracking.
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.
✗
Enable detailed billing reports in the management account.
Why it's wrong here
Detailed billing reports are already available by default.
✓
Enable the RI discount sharing feature in the management account.
Why this is correct
RI sharing allows cost benefits to be shared across accounts.
Related concept
Read the scenario before looking for a memorised answer.
✓
Activate cost allocation tags in the Billing and Cost Management console.
Why this is correct
Activated tags appear in cost reports.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable AWS Cost and Usage Reports (CUR) for each member account.
Why it's wrong here
CUR is not necessary for tag-based cost allocation.
✓
Define and enforce a tagging strategy using AWS Organizations tag policies.
Why this is correct
Tag policies help enforce consistent tagging across accounts.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think detailed billing reports or per-account CUR are needed for granular cost tracking, but AWS Organizations requires CUR and tag policies to be configured at the management account level for consolidated, department-level cost allocation.
Detailed technical explanation
How to think about this question
AWS Organizations consolidates billing at the management account level, and CUR provides a single, comprehensive dataset that includes all member account usage and costs. Tag policies enforce consistent tagging across accounts, which is critical for filtering and grouping costs by department in CUR or AWS Cost Explorer. RI discount sharing must be explicitly enabled because, by default, discounts are not shared across accounts in an organization.
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.
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
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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: Enable the RI discount sharing feature in the management account. — Option B is correct because enabling RI discount sharing in the management account allows all accounts in the AWS Organization to benefit from Reserved Instance discounts, which is essential for accurate cost allocation across departments. Without this, RI discounts would only apply to the purchasing account, skewing department-level cost tracking.
What should I do if I get this SAP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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