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Question 689 of 1,748

Security Logging and Monitoring →hardMultiple ChoiceObjective-mapped

SCS-C02 Security Logging and Monitoring Practice Question

This SCS-C02 practice question tests your understanding of security logging and monitoring. 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 uses AWS CloudTrail to log all API activity and delivers logs to an S3 bucket with server-side encryption (SSE-S3). The security team needs to ensure that only authorized personnel can access the logs and that any unauthorized access attempts are logged and alerted. Additionally, the team wants to prevent the logs from being deleted for at least one year. Which combination of actions should be taken?

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
Enable S3 Object Lock with a retention period of one year; enable S3 server access logs; use a bucket policy with a condition that allows access only from authorized IAM roles or users.
Object Lock prevents deletion; server access logs record all requests; bucket policy with conditions restricts access.
B
Enable S3 default encryption (SSE-S3) on the bucket; enable S3 server access logs; attach an IAM policy that allows only authorized users to access the bucket.
Why wrong: SSE-S3 does not prevent deletion; server access logs record requests but not unauthorized access attempts specifically; IAM policies alone may not restrict access if bucket policies are permissive.
C
Enable MFA Delete on the bucket; enable CloudTrail log file validation; use bucket ACLs to restrict access.
Why wrong: MFA Delete prevents deletion but requires multi-factor authentication; CloudTrail log file validation ensures integrity but does not prevent deletion; ACLs are not recommended.
D
Enable S3 Inventory to track objects; enable CloudTrail to log S3 API calls; use a bucket policy with a deny effect for unauthorized users.
Why wrong: Inventory does not prevent deletion; CloudTrail logs API calls but does not prevent deletion; deny policies can restrict access but Object Lock is more effective for preventing deletion.

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

✓

Enable S3 Object Lock with a retention period of one year; enable S3 server access logs; use a bucket policy with a condition that allows access only from authorized IAM roles or users.

Option A is correct because S3 Object Lock with a retention period of one year enforces a write-once-read-many (WORM) model, preventing any deletion or overwrite of log objects for that duration. S3 server access logs capture detailed records of all requests made to the bucket, including unauthorized access attempts, which can be used for alerting. The bucket policy with a condition restricting access to authorized IAM roles or users ensures that only permitted principals can access the logs, meeting the security team's requirements for access control, logging of unauthorized attempts, and deletion prevention.

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 S3 Object Lock with a retention period of one year; enable S3 server access logs; use a bucket policy with a condition that allows access only from authorized IAM roles or users.
Why this is correct
Object Lock prevents deletion; server access logs record all requests; bucket policy with conditions restricts access.
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 S3 default encryption (SSE-S3) on the bucket; enable S3 server access logs; attach an IAM policy that allows only authorized users to access the bucket.
Why it's wrong here
SSE-S3 does not prevent deletion; server access logs record requests but not unauthorized access attempts specifically; IAM policies alone may not restrict access if bucket policies are permissive.
✗
Enable MFA Delete on the bucket; enable CloudTrail log file validation; use bucket ACLs to restrict access.
Why it's wrong here
MFA Delete prevents deletion but requires multi-factor authentication; CloudTrail log file validation ensures integrity but does not prevent deletion; ACLs are not recommended.
✗
Enable S3 Inventory to track objects; enable CloudTrail to log S3 API calls; use a bucket policy with a deny effect for unauthorized users.
Why it's wrong here
Inventory does not prevent deletion; CloudTrail logs API calls but does not prevent deletion; deny policies can restrict access but Object Lock is more effective for preventing deletion.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse S3 default encryption with data retention controls, or assume that CloudTrail logging of S3 API calls is sufficient to capture unauthorized access attempts, when in fact S3 server access logs are needed for request-level logging of denied operations.

Detailed technical explanation

How to think about this question

S3 Object Lock uses a combination of retention modes (Governance or Compliance) and retention periods to enforce WORM protection; in Compliance mode, even the root user cannot delete objects before the retention period expires. S3 server access logs are delivered to a separate bucket and include fields like `Requester`, `Operation`, and `HTTP Status` (e.g., 403 for denied requests), enabling security teams to set up Amazon EventBridge rules or CloudWatch alarms on these logs for real-time alerting. Bucket policies with `aws:PrincipalArn` or `aws:SourceArn` conditions provide fine-grained access control, while `Deny` statements with `Null` conditions can explicitly block unauthorized principals.

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?

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

What is the correct answer to this question?

The correct answer is: Enable S3 Object Lock with a retention period of one year; enable S3 server access logs; use a bucket policy with a condition that allows access only from authorized IAM roles or users. — Option A is correct because S3 Object Lock with a retention period of one year enforces a write-once-read-many (WORM) model, preventing any deletion or overwrite of log objects for that duration. S3 server access logs capture detailed records of all requests made to the bucket, including unauthorized access attempts, which can be used for alerting. The bucket policy with a condition restricting access to authorized IAM roles or users ensures that only permitted principals can access the logs, meeting the security team's requirements for access control, logging of unauthorized attempts, and deletion prevention.

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: "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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This SCS-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SCS-C02 exam.