SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. 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 security engineer has attached the above IAM policy to a role used by an application to write logs to an S3 bucket. However, the application is unable to write logs. 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
✓
The application does not set the x-amz-acl header to bucket-owner-full-control on PutObject requests.
Option B is correct because when an IAM policy grants PutObject access to an S3 bucket, the application must also include the `x-amz-acl: bucket-owner-full-control` header in its PutObject requests to ensure the bucket owner retains full control over the uploaded objects. Without this header, the object is owned by the writer (the role), and the bucket owner cannot manage it, causing the write to fail due to access control mismatches, especially in cross-account scenarios or when the bucket policy enforces specific ACLs.
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 Effect is set to Allow, which is too permissive.
Why it's wrong here
Allow is needed to grant access.
✓
The application does not set the x-amz-acl header to bucket-owner-full-control on PutObject requests.
Why this is correct
The condition requires the ACL to be set; without it, the request fails.
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 policy does not allow server-side encryption.
Why it's wrong here
The policy does not mention encryption, but that is not required for writing logs.
✗
The resource ARN is incorrect; it should be arn:aws:s3:::my-log-bucket/*.
Why it's wrong here
The resource ARN is correct for the path AWSLogs/.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often focus on IAM policy syntax errors (like ARN format or missing actions) and overlook the requirement for specific request headers (like ACLs) that are enforced by the bucket policy or S3 default settings, not by the IAM policy itself.
Detailed technical explanation
How to think about this question
Under the hood, S3 object ownership is determined by the ACL applied at upload time. If the `bucket-owner-full-control` canned ACL is not specified, the object is owned by the AWS account that made the request, which can lead to access denied errors when the bucket owner tries to manage or read the object. This is a common pitfall in multi-account logging setups where the application writes logs to a bucket owned by a different account, and the bucket policy requires the ACL to enforce ownership transfer.
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.
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: The application does not set the x-amz-acl header to bucket-owner-full-control on PutObject requests. — Option B is correct because when an IAM policy grants PutObject access to an S3 bucket, the application must also include the `x-amz-acl: bucket-owner-full-control` header in its PutObject requests to ensure the bucket owner retains full control over the uploaded objects. Without this header, the object is owned by the writer (the role), and the bucket owner cannot manage it, causing the write to fail due to access control mismatches, especially in cross-account scenarios or when the bucket policy enforces specific ACLs.
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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Question Discussion
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