- A
Enable cross-region replication
Why wrong: Replication increases costs.
- B
Enable versioning to keep multiple versions
Why wrong: Versioning increases costs.
- C
Use lifecycle policies to expire objects after a certain period
Expiration deletes unneeded objects.
- D
Enable MFA Delete for extra security
Why wrong: MFA Delete does not reduce cost.
- E
Transition objects to S3 Standard-IA after 30 days
Standard-IA is cheaper for infrequent access.
Question 1,273 of 1,786
DEA-C01 Data Store Management Practice Question
This DEA-C01 practice question tests your understanding of data store management. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Which TWO actions can reduce the cost of an Amazon S3 bucket that stores infrequently accessed data? (Choose 2.)
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
✓
Use lifecycle policies to expire objects after a certain period
Option C is correct because lifecycle policies allow you to define rules that automatically expire (delete) objects after a specified period, which directly reduces storage costs by removing data that is no longer needed. For infrequently accessed data, deleting obsolete objects prevents paying for unnecessary storage over time.
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.
- ✗
Enable cross-region replication
Why it's wrong here
Replication increases costs.
- ✗
Enable versioning to keep multiple versions
Why it's wrong here
Versioning increases costs.
- ✓
Use lifecycle policies to expire objects after a certain period
Why this is correct
Expiration deletes unneeded objects.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable MFA Delete for extra security
Why it's wrong here
MFA Delete does not reduce cost.
- ✓
Transition objects to S3 Standard-IA after 30 days
Why this is correct
Standard-IA is cheaper for infrequent access.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The DEA-C01 exam often tests the misconception that enabling versioning or replication reduces costs, when in fact both increase storage and transfer costs, while lifecycle policies and storage class transitions are the correct cost-saving mechanisms.
Detailed technical explanation
How to think about this question
S3 lifecycle policies operate by evaluating object age based on the creation date and applying transitions or expirations at the object level. The expiration action permanently removes the object after the specified number of days, and you can combine it with transitions (e.g., to S3 Glacier Deep Archive) for a tiered cost optimization strategy. A real-world scenario is a log archive bucket where logs older than 90 days are automatically deleted, preventing runaway storage bills.
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: Use lifecycle policies to expire objects after a certain period — Option C is correct because lifecycle policies allow you to define rules that automatically expire (delete) objects after a specified period, which directly reduces storage costs by removing data that is no longer needed. For infrequently accessed data, deleting obsolete objects prevents paying for unnecessary storage over time.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This DEA-C01 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 DEA-C01 exam.
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