DEA-C01 Data Operations and Support Practice Question
Network Topology
Refer to the exhibit. A data engineer runs this CLI command to check an object's metadata. The engineer wants to verify if the object is eligible for lifecycle transition to S3 Glacier based on its age. What additional information is needed?
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 current date
The CLI command output provides the last modified date of the object. To determine if the object is eligible for lifecycle transition to S3 Glacier based on its age, the engineer needs the current date to compute the object's age. The age is calculated as the difference between the current date and the last modified date. Option A is correct because without the current date, the engineer cannot verify the age condition. Option B (ETag) is used for integrity checking and not for age calculations. Option C (metadata archive flag) is not relevant; the archive flag indicates storage class but not age. Option D (ContentLength) is the object size and does not affect lifecycle age eligibility.
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 current date
Why this is correct
The object age is based on LastModified and current date.
- ✗
The ETag value
Why it's wrong here
ETag is for integrity checks.
- ✗
The metadata archive flag
Why it's wrong here
Metadata does not indicate age.
- ✗
The ContentLength value
Why it's wrong here
File size is not needed for age-based transition.
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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