The answer is that SCPs cannot evaluate the current state of a resource; they can only deny actions based on request parameters. This is the most likely reason the SCP fails to prevent disabling S3 versioning on existing buckets, because the policy attempts to check whether versioning is currently enabled on the bucket, but SCPs operate at the API request level and have no visibility into the bucket’s existing configuration. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of the difference between identity-based policies and resource-based conditions, specifically that SCPs lack the ability to inspect resource state. A common trap is assuming SCPs can enforce compliance retroactively, when in fact they only block or allow the action itself. Memory tip: SCPs are “state-blind”—they see the request, not the resource.
SAP-C02 Practice Question: Design Solutions for Organizational Complexity
This SAP-C02 practice question tests your understanding of design solutions for organizational complexity. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 uses AWS Organizations and has deployed a multi-account strategy. The security team wants to enforce that all S3 buckets have versioning enabled. They create an SCP that denies the PutBucketVersioning action if versioning is not enabled. However, they find that the SCP is not preventing users in member accounts from disabling versioning on existing buckets. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
SCPs cannot evaluate the current state of a resource; they can only deny actions based on request parameters.
Option D is correct because SCPs are evaluated before the actual API call, but they cannot see the current state of the bucket. The SCP denies the PutBucketVersioning action only if the condition checks for the current setting, but SCPs cannot access the bucket's current configuration. Therefore, the SCP as described would not block the action. Option A is wrong because SCPs apply to all users. Option B is wrong because SCPs are not optional. Option C is wrong because SCPs do not require explicit allow.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The SCP is overridden by a service control policy that allows the action.
Why it's wrong here
SCPs do not override; they are additive.
✗
The SCP does not have an explicit deny; it uses a default deny.
Why it's wrong here
SCPs are deny by default.
✓
SCPs cannot evaluate the current state of a resource; they can only deny actions based on request parameters.
Why this is correct
SCPs cannot check existing bucket configuration.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
✗
The SCP is not applied to the root organizational unit.
Why it's wrong here
SCPs apply at any level.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SAP-C02 ACL questions on filtering logic and placement.
Design Solutions for Organizational Complexity — This question tests Design Solutions for Organizational Complexity — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: SCPs cannot evaluate the current state of a resource; they can only deny actions based on request parameters. — Option D is correct because SCPs are evaluated before the actual API call, but they cannot see the current state of the bucket. The SCP denies the PutBucketVersioning action only if the condition checks for the current setting, but SCPs cannot access the bucket's current configuration. Therefore, the SCP as described would not block the action. Option A is wrong because SCPs apply to all users. Option B is wrong because SCPs are not optional. Option C is wrong because SCPs do not require explicit allow.
What should I do if I get this SAP-C02 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SAP-C02 ACL questions on filtering logic and placement.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Standard ACLs match source addresses.
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