DEA-C01 Data Store Management Practice Question
Network Topology
A data engineer ran the command shown in the exhibit on the bucket 'my-data-lake'. The engineer then tries to delete an object version but receives an 'AccessDenied' error. The engineer has full S3 permissions via IAM. What is the most likely reason for the error?
⚠ Common exam trap
Many candidates assume 'full S3 permissions via IAM' guarantees all operations succeed, but MFA Delete is a bucket-level condition that overrides IAM permissions for version deletion and versioning state changes, requiring explicit MFA authentication.
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
✓
MFA Delete is enabled, requiring multi-factor authentication
The command shown in the exhibit (likely `aws s3api put-bucket-versioning --bucket my-data-lake --versioning-configuration Status=Enabled,MFADelete=Enabled`) enables both versioning and MFA Delete on the bucket. When MFA Delete is enabled, any operation that permanently deletes an object version or changes the versioning state requires the request to include a multi-factor authentication token. Even though the engineer has full S3 permissions via IAM, the missing MFA token causes the 'AccessDenied' error. This is a bucket-level setting that overrides IAM permissions for these specific operations.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Versioning is suspended on the bucket
Why it's wrong here
Versioning is enabled according to the output.
- ✓
MFA Delete is enabled, requiring multi-factor authentication
Why this is correct
MFA Delete requires additional authentication to delete versions.
- ✗
The bucket policy denies s3:DeleteObjectVersion
Why it's wrong here
The bucket policy is not shown, but the engineer has full S3 permissions.
- ✗
An S3 Object Lock retention policy is in effect
Why it's wrong here
Object Lock is not indicated in the output.
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
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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