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Question 15 of 1,546

Monitoring, Logging, and Remediation →mediumMultiple ChoiceObjective-mapped

SOA-C02 Monitoring, Logging, and Remediation Practice Question

This SOA-C02 practice question tests your understanding of monitoring, logging, and remediation. 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 an Amazon S3 bucket to store sensitive data. The SysOps administrator needs to be notified within 15 minutes if any object in the bucket becomes publicly accessible. Which solution will meet this requirement with the least operational overhead?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.

A
Configure an S3 event notification for all object creation events and publish to an Amazon SNS topic that sends an email alert.
Why wrong: Option A is incorrect because S3 event notifications for all object creation events do not capture ACL changes after creation, and they cannot filter based on public grants, leading to many false positives.
B
Use an AWS Config managed rule to detect 's3-bucket-public-read-prohibited' and trigger an SNS notification via Amazon EventBridge.
Option B is correct because AWS Config's managed rule 's3-bucket-public-read-prohibited' detects when a bucket policy allows public read access, and via EventBridge it can trigger an SNS notification within minutes, fulfilling the requirement with minimal overhead.
C
Enable Amazon CloudTrail data events for the S3 bucket and create a CloudWatch Logs metric filter for PutObjectAcl (or PutObject with public ACL) and set an alarm.
Why wrong: Option C is incorrect because while it can detect public ACL changes, it requires enabling CloudTrail data events, creating CloudWatch metric filters, and setting alarms, which adds significant operational overhead and potential latency.
D
Configure S3 event notifications for 's3:ObjectCreated:Put' and 's3:ObjectCreated:PutObjectAcl' with a suffix/prefix filter for public grants, sending to an SNS topic.
Why wrong: Option D is incorrect because S3 event notifications cannot filter based on the ACL being public; they only trigger on the event type itself, so you'd get alerts for every PutObject or PutObjectAcl, even if the object is not made public.

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

✓

Use an AWS Config managed rule to detect 's3-bucket-public-read-prohibited' and trigger an SNS notification via Amazon EventBridge.

Option B is correct because AWS Config's managed rule 's3-bucket-public-read-prohibited' checks bucket policies for public access. When a bucket policy allows public read access (which can affect all objects), the rule detects it and triggers an SNS notification via Amazon EventBridge. This meets the 15-minute requirement with low operational overhead, as it uses native AWS Config and EventBridge without custom solutions. Option A fails to detect ACL changes after creation. Option D cannot filter based on ACL permissions, resulting in false positives and no guarantee of detecting public access. Option C requires CloudTrail, CloudWatch Logs, and metric filters, adding complexity and potential latency.

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.

✗
Configure an S3 event notification for all object creation events and publish to an Amazon SNS topic that sends an email alert.
Why it's wrong here
Option A is incorrect because S3 event notifications for all object creation events do not capture ACL changes after creation, and they cannot filter based on public grants, leading to many false positives.
✓
Use an AWS Config managed rule to detect 's3-bucket-public-read-prohibited' and trigger an SNS notification via Amazon EventBridge.
Why this is correct
Option B is correct because AWS Config's managed rule 's3-bucket-public-read-prohibited' detects when a bucket policy allows public read access, and via EventBridge it can trigger an SNS notification within minutes, fulfilling the requirement with minimal overhead.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable Amazon CloudTrail data events for the S3 bucket and create a CloudWatch Logs metric filter for PutObjectAcl (or PutObject with public ACL) and set an alarm.
Why it's wrong here
Option C is incorrect because while it can detect public ACL changes, it requires enabling CloudTrail data events, creating CloudWatch metric filters, and setting alarms, which adds significant operational overhead and potential latency.
✗
Configure S3 event notifications for 's3:ObjectCreated:Put' and 's3:ObjectCreated:PutObjectAcl' with a suffix/prefix filter for public grants, sending to an SNS topic.
Why it's wrong here
Option D is incorrect because S3 event notifications cannot filter based on the ACL being public; they only trigger on the event type itself, so you'd get alerts for every PutObject or PutObjectAcl, even if the object is not made public.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap is that S3 event notifications cannot filter based on ACL grants; they only trigger on event types. AWS Config rules, while checking bucket policies, are a simpler way to detect public access at the bucket level, which is effectively object-level public access when the bucket is public.

Detailed technical explanation

How to think about this question

S3 event notifications use a push-based model where S3 sends events to SNS, SQS, or Lambda within seconds of the object creation or ACL modification, making it the fastest and simplest approach. The `PutObjectAcl` event is triggered when an ACL is explicitly set via the S3 API, while `PutObject` with a public ACL (e.g., `x-amz-acl: public-read`) also generates an `s3:ObjectCreated:Put` event; filtering by suffix/prefix on the object key or using a Lambda function to inspect the ACL can further refine detection. In contrast, CloudTrail data events are delivered to CloudWatch Logs in batches with a typical delay of 5–15 minutes, and Config rules evaluate resources periodically or on configuration changes, which may not capture object-level ACL changes promptly.

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.

Visual reference

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 SOA-C02 question test?

Monitoring, Logging, and Remediation — This question tests Monitoring, Logging, and Remediation — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Use an AWS Config managed rule to detect 's3-bucket-public-read-prohibited' and trigger an SNS notification via Amazon EventBridge. — Option B is correct because AWS Config's managed rule 's3-bucket-public-read-prohibited' checks bucket policies for public access. When a bucket policy allows public read access (which can affect all objects), the rule detects it and triggers an SNS notification via Amazon EventBridge. This meets the 15-minute requirement with low operational overhead, as it uses native AWS Config and EventBridge without custom solutions. Option A fails to detect ACL changes after creation. Option D cannot filter based on ACL permissions, resulting in false positives and no guarantee of detecting public access. Option C requires CloudTrail, CloudWatch Logs, and metric filters, adding complexity and potential latency.

What should I do if I get this SOA-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: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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