DEA-C01 Data Store Management Practice Question

Exhibit

Refer to the exhibit.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Deny",
            "Principal": "*",
            "Action": "s3:*",
            "Resource": [
                "arn:aws:s3:::data-lake-bucket/*",
                "arn:aws:s3:::data-lake-bucket"
            ],
            "Condition": {
                "Bool": {
                    "aws:SecureTransport": "false"
                }
            }
        },
        {
            "Effect": "Allow",
            "Principal": "*",
            "Action": "s3:GetObject",
            "Resource": "arn:aws:s3:::data-lake-bucket/*",
            "Condition": {
                "IpAddress": {
                    "aws:SourceIp": "10.0.0.0/16"
                }
            }
        }
    ]
}

Refer to the exhibit. A data engineer has attached this bucket policy to an S3 bucket named data-lake-bucket. The engineer wants to allow only GET requests from the corporate network (10.0.0.0/16) over HTTPS. However, users report that they cannot access objects even when connected to the corporate network. What is the issue?

⚠ Common exam trap

AWS often tests the principle that an explicit Deny overrides any Allow, leading candidates to focus on fixing the Allow statement rather than recognizing that the Deny unconditionally blocks HTTP traffic from all sources, including the corporate network.

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

✓

The Deny statement blocks all requests that are not using HTTPS, including those from the corporate network.

The Deny statement with `aws:SecureTransport` set to `false` blocks all HTTP requests. Since the Allow statement only permits GET requests from the corporate network (10.0.0.0/16) but does not require HTTPS, any request from that network that uses HTTP is denied by the explicit Deny. The Deny statement overrides the Allow, so even legitimate corporate users are blocked if they use HTTP.

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 Deny statement should include a condition on the source IP.
Why it's wrong here
Deny should apply to non-HTTPS regardless of IP.
✗
The Allow statement should include a condition for SecureTransport.
Why it's wrong here
Allow without SecureTransport condition is fine, but Deny is too restrictive.
✗
The Allow statement should specify s3:GetObject instead of s3:GetObject.
Why it's wrong here
Action is correct.
✓
The Deny statement blocks all requests that are not using HTTPS, including those from the corporate network.
Why this is correct
Deny overrides Allow when condition is met.

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

2 more ways this is tested on DEA-C01

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. Refer to the exhibit. A data engineer applies this bucket policy to an S3 bucket. A user within the 10.0.0.0/24 IP range attempts to upload an object to the bucket using an HTTP (non-HTTPS) request. What is the outcome?

hard

A.The upload succeeds because the Allow statement grants permission.
B.The upload succeeds because the user's IP is allowed.
C.The upload fails because the user's IP is not in the allowed range for PutObject.
✓ D.The upload fails because the request is not using HTTPS.

Why D: The bucket policy includes a condition `aws:SecureTransport` set to `false`, which explicitly denies any request that does not use HTTPS. Since the user is making an HTTP (non-HTTPS) request, the Deny statement overrides any Allow statement, causing the upload to fail. The correct answer is D.

Variation 2. Refer to the exhibit. A data engineer has attached this bucket policy to an S3 bucket. What is the effect of this policy?

hard

A.It enforces server-side encryption for all objects written to the bucket.
✓ B.It allows the DataLakeRole to read and write objects, but only over HTTPS.
C.It allows anonymous access to the bucket for HTTPS requests.
D.It denies all access to the bucket except for requests from the DataLakeRole.

Why B: The bucket policy uses a condition key `aws:SecureTransport` set to `true`, which restricts access to HTTPS (TLS) connections only. The `Principal` is `DataLakeRole`, and the `Action` includes `s3:GetObject` and `s3:PutObject`, so the policy allows that role to read and write objects exclusively over HTTPS, enforcing encrypted data in transit.

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This DEA-C01 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 DEA-C01 exam.