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Question 96 of 1,748

Threat Detection and Incident Response →hardMultiple ChoiceObjective-mapped

AWS Config Rule Not Evaluating All S3 Buckets Due to Tag — Troubleshooting

This SCS-C02 practice question tests your understanding of threat detection and incident response. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 security rule that all S3 buckets must have server access logging enabled. A security engineer uses AWS Config to evaluate compliance. The engineer configures a managed rule but notices that the rule does not evaluate all 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.

A
The rule only evaluates buckets in the us-east-1 region.
Why wrong: AWS Config rules can be configured to evaluate resources in all regions, not just us-east-1. The rule evaluates buckets based on the rule's scope, which is not limited by default.
B
The rule only evaluates buckets that have a specific tag.
The AWS Config managed rule `s3-bucket-server-access-logging-enabled` can be configured with a `tag` parameter. When a tag is specified, the rule only evaluates S3 buckets that have that exact tag. If the engineer did not apply the required tag to all buckets, or if the rule was configured with a tag that does not match all buckets, some buckets will be excluded.
C
The rule excludes buckets that have a bucket policy denying access to AWS Config.
Why wrong: Bucket policies that deny access to AWS Config would prevent Config from recording the bucket's configuration, but the rule evaluation itself is not affected by such policies. The rule would still attempt to evaluate the bucket, but might fail due to access denial, not silently exclude it.
D
The rule requires the logging target bucket to be in the same account.
Why wrong: The rule does not require the logging target bucket to be in the same account. It checks if server access logging is enabled on the source bucket, regardless of where the target bucket resides.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The rule only evaluates buckets that have a specific tag.

Option B is correct because the AWS Config managed rule `s3-bucket-server-access-logging-enabled` can be configured with a `tag` parameter. When a tag is specified, the rule only evaluates S3 buckets that have that exact tag key-value pair. If the security engineer did not apply the required tag to all buckets, or if the rule was configured with a tag that does not match all buckets, some buckets will be excluded from evaluation, causing the observed behavior.

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.

✗
The rule only evaluates buckets in the us-east-1 region.
Why it's wrong here
AWS Config rules can be configured to evaluate resources in all regions, not just us-east-1. The rule evaluates buckets based on the rule's scope, which is not limited by default.
✓
The rule only evaluates buckets that have a specific tag.
Why this is correct
The AWS Config managed rule `s3-bucket-server-access-logging-enabled` can be configured with a `tag` parameter. When a tag is specified, the rule only evaluates S3 buckets that have that exact tag. If the engineer did not apply the required tag to all buckets, or if the rule was configured with a tag that does not match all buckets, some buckets will be excluded.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The rule excludes buckets that have a bucket policy denying access to AWS Config.
Why it's wrong here
Bucket policies that deny access to AWS Config would prevent Config from recording the bucket's configuration, but the rule evaluation itself is not affected by such policies. The rule would still attempt to evaluate the bucket, but might fail due to access denial, not silently exclude it.
✗
The rule requires the logging target bucket to be in the same account.
Why it's wrong here
The rule does not require the logging target bucket to be in the same account. It checks if server access logging is enabled on the source bucket, regardless of where the target bucket resides.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often assume AWS Config managed rules evaluate all resources of a given type by default, overlooking the fact that many rules support optional tag-based filtering that can silently limit the scope of evaluation.

Detailed technical explanation

How to think about this question

Under the hood, the `s3-bucket-server-access-logging-enabled` managed rule uses an AWS Lambda function that evaluates the `logging` property of the S3 bucket resource. When a `tag` parameter is provided in the rule's input, the Lambda function filters the list of buckets to only those matching the tag before checking the logging configuration. This is a common pattern in AWS Config managed rules to allow scoped evaluations, but it can lead to incomplete coverage if the tag is not applied universally. In a real-world scenario, an engineer might inadvertently set a tag like 'Environment: Production' and then wonder why development or test buckets are not evaluated.

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 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.

Quick reference

AWS S3 Storage Class Comparison

Storage Class	Min Duration	Retrieval	Use Case
S3 Standard	None	Immediate	Frequently accessed data
S3 Standard-IA	30 days	Immediate	Infrequent access, rapid retrieval
S3 One Zone-IA	30 days	Immediate	Non-critical infrequent data
S3 Intelligent-Tiering	None	Immediate–hours	Unknown or changing access patterns
S3 Glacier Instant	90 days	Milliseconds	Archive with instant retrieval
S3 Glacier Flexible	90 days	Minutes–hours	Archive, flexible retrieval
S3 Glacier Deep Archive	180 days	Hours	Long-term compliance archive

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.

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FAQ

Questions learners often ask

What does this SCS-C02 question test?

Threat Detection and Incident Response — This question tests Threat Detection and Incident Response — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The rule only evaluates buckets that have a specific tag. — Option B is correct because the AWS Config managed rule `s3-bucket-server-access-logging-enabled` can be configured with a `tag` parameter. When a tag is specified, the rule only evaluates S3 buckets that have that exact tag key-value pair. If the security engineer did not apply the required tag to all buckets, or if the rule was configured with a tag that does not match all buckets, some buckets will be excluded from evaluation, causing the observed behavior.

What should I do if I get this SCS-C02 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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?

Read the scenario before looking for a memorised answer.

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