Quick Answer
The answer is S3 Lifecycle policies, the correct choice because they are purpose-built to automate storage class transitions based on age, enabling cost optimization by moving data older than one year to a lower-cost tier like S3 Glacier Deep Archive. This feature defines rules that automatically transition objects without manual intervention, directly meeting compliance requirements for data lifecycle management. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your ability to distinguish between automation features and storage classes—a common trap is confusing S3 Glacier (a storage class) with Lifecycle policies (the automation mechanism). Another pitfall is S3 Intelligent-Tiering, which optimizes costs based on access patterns but does not enforce a fixed age-based rule, making it unsuitable for strict compliance mandates. Remember the memory tip: Lifecycle policies are the "scheduler" for storage class moves, while Intelligent-Tiering is the "auto-pilot" for cost optimization—use Lifecycle when you need a specific age trigger.
This DEA-C01 practice question tests your understanding of data operations and support. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 stores sensitive data in Amazon S3. To meet compliance requirements, they need to ensure that any data older than 1 year is automatically moved to a lower-cost storage class. Which S3 feature should they use?
S3 Replication
Why wrong: Replication is for copying data, not changing storage class.
S3 Lifecycle policies
Lifecycle policies can transition objects to lower-cost storage classes based on age.
S3 Glacier
Why wrong: Glacier is a storage class, not a policy to automate transitions.
S3 Intelligent-Tiering
Why wrong: Intelligent-Tiering automatically moves data but does not guarantee a specific age-based transition.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
S3 Lifecycle policies
Option B is correct because S3 Lifecycle policies automate transitioning objects between storage classes. Option A is wrong because S3 Glacier is a storage class, not a feature to automate transitions. Option C is wrong because S3 Intelligent-Tiering automatically optimizes costs but does not enforce a specific age-based transition. Option D is wrong because S3 Replication is for copying objects across buckets.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
S3 Replication
Why it's wrong here
Replication is for copying data, not changing storage class.
S3 Lifecycle policies
Why this is correct
Lifecycle policies can transition objects to lower-cost storage classes based on age.
Related concept
Read the scenario before looking for a memorised answer.
S3 Glacier
Why it's wrong here
Glacier is a storage class, not a policy to automate transitions.
S3 Intelligent-Tiering
Why it's wrong here
Intelligent-Tiering automatically moves data but does not guarantee a specific age-based transition.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which DEA-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Data Operations and Support — This question tests Data Operations and Support — Read the scenario before looking for a memorised answer..
The correct answer is: S3 Lifecycle policies — Option B is correct because S3 Lifecycle policies automate transitioning objects between storage classes. Option A is wrong because S3 Glacier is a storage class, not a feature to automate transitions. Option C is wrong because S3 Intelligent-Tiering automatically optimizes costs but does not enforce a specific age-based transition. Option D is wrong because S3 Replication is for copying objects across buckets.
Identify which DEA-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 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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