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 is using Amazon S3 to store critical data and needs to ensure that objects are automatically transitioned to S3 Glacier Deep Archive after 180 days to reduce costs. Which S3 lifecycle action should be configured?
Expiration
Why wrong: Expiration deletes objects, not transitions them.
Transition
Transition moves objects to another storage class based on age.
AbortIncompleteMultipartUpload
Why wrong: This handles incomplete multipart uploads, not data lifecycle.
NoncurrentVersionTransition
Why wrong: This applies only to noncurrent versions of versioned objects.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Transition
Option B is correct because the S3 lifecycle 'Transition' action is specifically designed to move objects between storage classes after a specified number of days. To reduce costs by moving objects to S3 Glacier Deep Archive after 180 days, you configure a lifecycle rule with a Transition action that targets the 'DEEP_ARCHIVE' storage class at the 180-day mark.
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.
Expiration
Why it's wrong here
Expiration deletes objects, not transitions them.
Transition
Why this is correct
Transition moves objects to another storage class based on age.
Related concept
Read the scenario before looking for a memorised answer.
AbortIncompleteMultipartUpload
Why it's wrong here
This handles incomplete multipart uploads, not data lifecycle.
NoncurrentVersionTransition
Why it's wrong here
This applies only to noncurrent versions of versioned objects.
Common exam traps
The trap here is that candidates often confuse 'Expiration' (deletion) with 'Transition' (storage class change), or incorrectly apply 'NoncurrentVersionTransition' when the question does not mention versioning or noncurrent versions.
Detailed technical explanation
Under the hood, S3 lifecycle policies are evaluated once daily, and the transition action moves objects atomically between storage classes, with the minimum 180-day transition to Glacier Deep Archive enforced by the service. A common subtlety is that objects smaller than 128 KB are not eligible for transition to Glacier or Deep Archive, and the lifecycle rule will silently skip them. In a real-world scenario, if you also need to expire objects after a certain period, you would combine both Transition and Expiration actions in the same lifecycle rule.
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.
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FAQ
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
The correct answer is: Transition — Option B is correct because the S3 lifecycle 'Transition' action is specifically designed to move objects between storage classes after a specified number of days. To reduce costs by moving objects to S3 Glacier Deep Archive after 180 days, you configure a lifecycle rule with a Transition action that targets the 'DEEP_ARCHIVE' storage class at the 180-day mark.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 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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