DBS-C01 Management and Operations Practice Question

Exhibit

Refer to the exhibit.

-- IAM Policy attached to a role used by an EC2 instance:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": "s3:GetObject",
      "Resource": "arn:aws:s3:::data-lake-prod/*"
    },
    {
      "Effect": "Allow",
      "Action": "s3:PutObject",
      "Resource": "arn:aws:s3:::data-lake-prod/*"
    },
    {
      "Effect": "Deny",
      "Action": "s3:*",
      "Resource": "*",
      "Condition": {
        "StringEquals": {
          "aws:SourceIp": "10.0.0.0/8"
        }
      }
    }
  ]
}

Refer to the exhibit. An application on an EC2 instance is trying to read an object from the S3 bucket 'data-lake-prod'. The instance is in a VPC with an IP address of 10.0.1.5. The application receives an Access Denied error. What is the cause?

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

✓

A Deny statement with a source IP condition is blocking access.

The Deny statement applies to the source IP 10.0.1.5 (within 10.0.0.0/8), overriding the Allow. Option A is wrong because the IAM role does allow s3:GetObject on the bucket. Option C is wrong because there is no explicit condition on the Allow statement. Option D is wrong because the policy is attached to the role, not an SCP.

Answer analysis

Option-by-option breakdown

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

✗
An SCP is denying S3 access to the account.
Why it's wrong here
No SCP is shown.
✓
A Deny statement with a source IP condition is blocking access.
Why this is correct
The Deny with condition matches the IP and overrides the Allow.
✗
The S3 bucket policy requires a specific VPC endpoint.
Why it's wrong here
Not mentioned in the policy.
✗
The IAM role does not have permission to read from the bucket.
Why it's wrong here
The Allow statement grants s3:GetObject.

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

DBS-C01 Management and Operations Practice Question

Exhibit

Why each option matters

Option-by-option breakdown

AWS S3 Storage Class Comparison

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