DEA-C01 Data Security and Governance Practice Question
A data engineer is designing a data lake on Amazon S3. The compliance team requires that objects be automatically deleted after 7 years. Additionally, objects must be transitioned to Amazon S3 Glacier Instant Retrieval after 30 days to reduce costs. Which S3 lifecycle policy configuration meets these requirements?
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
✓
Transition to Glacier Instant Retrieval after 30 days, then expire after 2555 days.
It transitions objects to S3 Glacier Instant Retrieval after 30 days and then expires (permanently deletes) them after 2555 days, which is approximately 7 years (365 * 7 = 2555). This meets both the cost-saving and deletion requirements. Option A is incorrect because it expires after 90 days, not 7 years. Option C is incorrect because it uses Glacier Deep Archive instead of Glacier Instant Retrieval. Option D is incorrect because it uses S3 Standard-IA instead of Glacier Instant Retrieval.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Transition to Glacier Instant Retrieval after 30 days, then expire after 90 days.
Why it's wrong here
Expiration after 90 days does not meet 7-year requirement.
- ✓
Transition to Glacier Instant Retrieval after 30 days, then expire after 2555 days.
Why this is correct
2555 days is approximately 7 years.
- ✗
Transition to Glacier Deep Archive after 30 days, then expire after 7 years.
Why it's wrong here
Spec requires Glacier Instant Retrieval, not Deep Archive.
- ✗
Transition to S3 Standard-IA after 30 days, then expire after 7 years.
Why it's wrong here
Standard-IA is not Glacier Instant Retrieval.
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 |
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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