This DEA-C01 practice question tests your understanding of data operations and support. 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.
Refer to the exhibit. A company has an S3 bucket 'my-data-lake' with the lifecycle policy shown. Objects under the 'logs/' prefix are being moved to GLACIER after 30 days and expire after 365 days. A data engineer notices that objects older than 365 days are still present in the bucket and are not being deleted. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Lifecycle expiration does not apply to objects in GLACIER storage class
Objects in GLACIER cannot be expired; they must be restored first.
The rule status is disabled
Why wrong: The rule is enabled.
The prefix filter does not match the objects
Why wrong: The prefix is correct.
The expiration days count from the transition date, not the object creation date
Why wrong: Days count from object creation.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Lifecycle expiration does not apply to objects in GLACIER storage class
Option C is correct because objects in GLACIER storage class can only be expired if they are restored first, or the expiration action must be applied to the current version. The policy does not specify a filter for current version, and GLACIER objects are not deletable by lifecycle without restoration. Option A is wrong because 365 days have passed. Option B is wrong because the prefix is correct. Option D is wrong because the rule is enabled.
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.
Lifecycle expiration does not apply to objects in GLACIER storage class
Why this is correct
Objects in GLACIER cannot be expired; they must be restored first.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
The rule status is disabled
Why it's wrong here
The rule is enabled.
The prefix filter does not match the objects
Why it's wrong here
The prefix is correct.
The expiration days count from the transition date, not the object creation date
Why it's wrong here
Days count from object creation.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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: Lifecycle expiration does not apply to objects in GLACIER storage class — Option C is correct because objects in GLACIER storage class can only be expired if they are restored first, or the expiration action must be applied to the current version. The policy does not specify a filter for current version, and GLACIER objects are not deletable by lifecycle without restoration. Option A is wrong because 365 days have passed. Option B is wrong because the prefix is correct. Option D is wrong because the rule is enabled.
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.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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