Question 775 of 724
DVA-C02 Security Practice Question
A company requires that all API calls to create an Amazon S3 bucket must include a specific tag (e.g., 'CostCenter'). Which IAM policy condition key should a developer use to enforce this requirement?
⚠ Common exam trap
Test-takers frequently confuse `aws:RequestTag` (tags in the request) with `aws:ResourceTag` (tags on an existing resource), leading them to choose the wrong condition key for enforcing tagging at resource creation.
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
✓
aws:RequestTag
The `aws:RequestTag` condition key evaluates the tags that are included in the API request itself. When a developer attempts to create an S3 bucket, the IAM policy can use `aws:RequestTag` to require that a specific tag key (e.g., 'CostCenter') is present in the `CreateBucket` request. This ensures that the tag is applied at creation time, enforcing the company's tagging requirement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
aws:RequestTag
Why this is correct
This condition key checks tags that are included in the API request. You can require a specific tag key and value to be present on the CreateBucket request, ensuring that all buckets are tagged at creation.
- ✗
aws:ResourceTag
Why it's wrong here
The `aws:ResourceTag` condition key is designed to evaluate tags that are already associated with an *existing* AWS resource. When a `CreateBucket` API call is made, the S3 bucket resource does not yet exist, meaning there are no resource tags to evaluate at that specific moment. Therefore, this condition key cannot be used to enforce the presence of a tag during the initial creation of a new S3 bucket, as it only applies to resources that have already been created and tagged.
- ✗
s3:ExistingObjectTag
Why it's wrong here
The `s3:ExistingObjectTag` condition key is specifically designed to control access based on tags that are already applied to *S3 objects*, not S3 buckets. Its purpose is to evaluate tags on objects that currently exist within a bucket, typically for actions like `s3:GetObject` or `s3:PutObject`. Since the requirement is to enforce tagging during the creation of an S3 *bucket*, and not an object, this condition key is entirely irrelevant to the `CreateBucket` API action.
- ✗
aws:TagKeys
Why it's wrong here
The `aws:TagKeys` condition key restricts which tag keys can be used in a request, but it does not enforce that a tag must be present on the API call itself. This fails the requirement because a user could omit the 'CostCenter' tag entirely and the policy would still allow the `CreateBucket` action. It is tempting because `aws:TagKeys` is commonly used to control tag key names on resources, and it would be the correct choice if the goal were to limit which tag keys are allowed (e.g., only 'CostCenter' and 'Environment') rather than to mandate that a specific tag be included in the request.
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 |
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 11, 2026
This DVA-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 DVA-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.