SAP-C02 Practice Question: Design Solutions for Organizational Complexity

Exhibit

Refer to the exhibit.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "Service": "cloudtrail.amazonaws.com"
      },
      "Action": "s3:PutObject",
      "Resource": "arn:aws:s3:::my-company-logs/AWSLogs/*",
      "Condition": {
        "StringEquals": {
          "s3:x-amz-acl": "bucket-owner-full-control"
        }
      }
    },
    {
      "Effect": "Deny",
      "Principal": "*",
      "Action": "s3:PutObject",
      "Resource": "arn:aws:s3:::my-company-logs/AWSLogs/*",
      "Condition": {
        "StringNotEquals": {
          "s3:x-amz-acl": "bucket-owner-full-control"
        }
      }
    }
  ]
}

Refer to the exhibit. A company applies this S3 bucket policy to a central logging bucket. CloudTrail trails in multiple accounts are configured to deliver logs to this bucket. Recently, logs stopped being delivered. What is the most likely cause?

⚠ Common exam trap

The trap here is that candidates often overlook the ACL requirement for cross-account S3 log delivery, assuming that a bucket policy alone is sufficient to grant the bucket owner full control, when in fact CloudTrail must be explicitly configured to set the 'bucket-owner-full-control' ACL.

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

✓

CloudTrail does not automatically set the 'bucket-owner-full-control' ACL when delivering logs.

When CloudTrail delivers logs to an S3 bucket owned by a different account, it does not automatically set the 'bucket-owner-full-control' ACL on the delivered objects. Without this ACL, the bucket owner (the central logging account) does not have full control over the objects, and the bucket policy's Deny statement (which requires s3:GetObjectAcl and s3:PutObjectAcl for bucket-owner-full-control) will block access, causing log delivery to fail. The solution is to configure CloudTrail to apply the 'bucket-owner-full-control' canned ACL or modify the bucket policy to grant the bucket owner full control via a different mechanism.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
CloudTrail does not automatically set the 'bucket-owner-full-control' ACL when delivering logs.
Why this is correct
The condition requires the ACL, but CloudTrail does not set it, causing denial.
✗
The Principal element uses 'cloudtrail.amazonaws.com' which is not the correct service principal.
Why it's wrong here
It is the correct service principal.
✗
The Resource ARN does not include the account ID, so it matches all accounts.
Why it's wrong here
The resource ARN is correct for the prefix.
✗
The policy uses 'Deny' which is not allowed in S3 bucket policies.
Why it's wrong here
Deny is allowed in bucket policies.

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

Go deeper

SAP-C02 Practice Question: Design Solutions for Organizational Complexity

Exhibit

Why each option matters

Option-by-option breakdown

AWS S3 Storage Class Comparison

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