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Data Store Management →hardMultiple SelectObjective-mapped

DEA-C01 Data Store Management Practice Question

This DEA-C01 practice question tests your understanding of data store management. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

A company uses Amazon S3 to store log files that are generated every hour. Each log file is about 1 GB. The logs must be stored for 5 years for compliance. The data engineer wants to minimize storage costs while ensuring that logs can be retrieved within 24 hours for the first year, and within 48 hours thereafter. Which THREE lifecycle actions should the engineer configure? (Choose THREE.)

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

A
Transition objects to S3 Standard after 30 days.
Why wrong: Incorrect. Transitioning to S3 Standard after 30 days is more expensive than transitioning to S3 Standard-IA, which provides lower cost for infrequent access while still meeting the 24-hour retrieval requirement during the first year.
B
Transition objects to S3 Glacier Deep Archive after 1 year.
Correct. Transitioning to S3 Glacier Deep Archive after 1 year minimizes storage costs for the remaining retention period, and the 48-hour retrieval window meets the compliance requirement after the first year.
C
Set a retrieval window of 48 hours for Glacier Deep Archive.
Why wrong: Incorrect. Setting a retrieval window is not a lifecycle action; it is a parameter used when initiating a restore request. Lifecycle actions include transitions and expirations only.
D
Delete objects after 2 years to reduce storage costs.
Why wrong: Incorrect. Deleting objects after 2 years would violate the 5-year compliance requirement. Objects must be retained for the full 5 years.
E
Transition objects to S3 Standard-IA after 30 days.
Correct. Transitioning to S3 Standard-IA after 30 days reduces storage costs for infrequently accessed logs while ensuring retrieval within 24 hours during the first year.

Full breakdown with real-world context →

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 objects to S3 Glacier Deep Archive after 1 year.

Option B is correct because transitioning objects to S3 Glacier Deep Archive after 1 year provides the lowest storage cost while meeting the 5-year retention requirement. After the first year, the retrieval window of up to 48 hours for Glacier Deep Archive satisfies the compliance need. Option E is correct because after 30 days, logs are less frequently accessed but still need retrieval within 24 hours during the first year; S3 Standard-IA offers lower cost than S3 Standard for such infrequent access. Option A is incorrect because transitioning to S3 Standard after 30 days is more expensive than Standard-IA and does not provide cost savings. Option C is incorrect because 'Set a retrieval window of 48 hours for Glacier Deep Archive' is not a lifecycle action; retrieval windows are configured during restore operations, not in lifecycle rules. Option D is incorrect because deleting objects after 2 years violates the 5-year retention policy.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

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 objects to S3 Standard after 30 days.
Why it's wrong here
Incorrect. Transitioning to S3 Standard after 30 days is more expensive than transitioning to S3 Standard-IA, which provides lower cost for infrequent access while still meeting the 24-hour retrieval requirement during the first year.
✓
Transition objects to S3 Glacier Deep Archive after 1 year.
Why this is correct
Correct. Transitioning to S3 Glacier Deep Archive after 1 year minimizes storage costs for the remaining retention period, and the 48-hour retrieval window meets the compliance requirement after the first year.
Clue confirmation
The clue words "first", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set a retrieval window of 48 hours for Glacier Deep Archive.
Why it's wrong here
Incorrect. Setting a retrieval window is not a lifecycle action; it is a parameter used when initiating a restore request. Lifecycle actions include transitions and expirations only.
✗
Delete objects after 2 years to reduce storage costs.
Why it's wrong here
Incorrect. Deleting objects after 2 years would violate the 5-year compliance requirement. Objects must be retained for the full 5 years.
✓
Transition objects to S3 Standard-IA after 30 days.
Why this is correct
Correct. Transitioning to S3 Standard-IA after 30 days reduces storage costs for infrequently accessed logs while ensuring retrieval within 24 hours during the first year.
Clue confirmation
The clue words "first", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Candidates might think Option C is not a lifecycle action because retrieval windows are typically set during restore, but in S3 you can specify the retrieval window as part of the lifecycle transition rule when using Glacier Deep Archive. The trap is that some candidates may incorrectly select Option A (S3 Standard) or Option D (delete after 2 years) due to misinterpreting the access patterns or retention requirements.

Detailed technical explanation

How to think about this question

S3 Lifecycle policies allow you to define transitions between storage classes based on object age. S3 Glacier Deep Archive uses a 12–48 hour retrieval time and is optimized for long-term archival at the lowest cost, making it ideal for compliance data that is rarely accessed. The retrieval window is set at the object level when restoring, not as a lifecycle action; the 48-hour window in Option C is a configuration for the restore request, not a lifecycle rule.

KKey Concepts to Remember

Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.

TExam Day Tips

Watch for words such as best, first, most likely and least administrative effort.
Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.

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

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this DEA-C01 question test?

Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Transition objects to S3 Glacier Deep Archive after 1 year. — Option B is correct because transitioning objects to S3 Glacier Deep Archive after 1 year provides the lowest storage cost while meeting the 5-year retention requirement. After the first year, the retrieval window of up to 48 hours for Glacier Deep Archive satisfies the compliance need. Option E is correct because after 30 days, logs are less frequently accessed but still need retrieval within 24 hours during the first year; S3 Standard-IA offers lower cost than S3 Standard for such infrequent access. Option A is incorrect because transitioning to S3 Standard after 30 days is more expensive than Standard-IA and does not provide cost savings. Option C is incorrect because 'Set a retrieval window of 48 hours for Glacier Deep Archive' is not a lifecycle action; retrieval windows are configured during restore operations, not in lifecycle rules. Option D is incorrect because deleting objects after 2 years violates the 5-year retention policy.

What should I do if I get this DEA-C01 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "first", "minimum / minimize". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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