- A
S3 Versioning
Why wrong: Versioning maintains multiple copies of objects for recovery purposes. It does not automate the transition of objects between storage classes.
- B
S3 Lifecycle policy
S3 Lifecycle policies automate the transition of objects between storage classes based on defined rules (e.g., move to Standard-IA after 30 days, then to Glacier after 365 days). This reduces cost without manual intervention.
- C
S3 Intelligent-Tiering
Why wrong: Intelligent-Tiering automatically moves objects between frequent and infrequent access tiers based on access patterns — but only within the Intelligent-Tiering storage class. Lifecycle policies give explicit control over transitions to Glacier tiers.
- D
S3 Event Notification
Why wrong: S3 Event Notifications trigger actions (Lambda, SNS, SQS) when objects are created, deleted, or restored. They do not automate storage class transitions.
S3 Lifecycle Transition: Move Objects to Cheaper Storage
This CLF-C02 practice question tests your understanding of cloud technology and services. 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 log files in Amazon S3 Standard. After 30 days, the logs are rarely accessed. After 365 days, they should be archived and almost never retrieved. The company wants to automatically move objects between storage classes to minimise cost. Which S3 feature enables this automated transition?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"never"Why it matters: Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
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
S3 Lifecycle policy
S3 Lifecycle policies allow you to define rules that automatically transition objects between storage classes based on age or other criteria. In this scenario, a lifecycle rule can move logs from S3 Standard to a lower-cost infrequent access class after 30 days, and then to S3 Glacier Deep Archive after 365 days, minimizing storage costs without manual intervention.
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.
- ✗
S3 Versioning
Why it's wrong here
Versioning maintains multiple copies of objects for recovery purposes. It does not automate the transition of objects between storage classes.
- ✓
S3 Lifecycle policy
Why this is correct
S3 Lifecycle policies automate the transition of objects between storage classes based on defined rules (e.g., move to Standard-IA after 30 days, then to Glacier after 365 days). This reduces cost without manual intervention.
Clue confirmation
The clue word "never" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
S3 Intelligent-Tiering
Why it's wrong here
Intelligent-Tiering automatically moves objects between frequent and infrequent access tiers based on access patterns — but only within the Intelligent-Tiering storage class. Lifecycle policies give explicit control over transitions to Glacier tiers.
- ✗
S3 Event Notification
Why it's wrong here
S3 Event Notifications trigger actions (Lambda, SNS, SQS) when objects are created, deleted, or restored. They do not automate storage class transitions.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse S3 Intelligent-Tiering with a scheduled lifecycle policy, but Intelligent-Tiering does not allow you to specify exact day-based transitions — it only adapts to access patterns, making it unsuitable for fixed archiving schedules.
Detailed technical explanation
How to think about this question
S3 Lifecycle policies consist of transition actions (e.g., 'Transition to S3 Standard-IA after 30 days') and expiration actions (e.g., 'Permanently delete after 365 days'). The policy is applied at the bucket or prefix level, and objects are transitioned asynchronously — typically within 24–48 hours after the specified date. A common real-world scenario is compliance-driven archiving, where logs must be retained for a minimum period in a readily accessible class before moving to Glacier Deep Archive for long-term retention.
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.
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: S3 Lifecycle policy — S3 Lifecycle policies allow you to define rules that automatically transition objects between storage classes based on age or other criteria. In this scenario, a lifecycle rule can move logs from S3 Standard to a lower-cost infrequent access class after 30 days, and then to S3 Glacier Deep Archive after 365 days, minimizing storage costs without manual intervention.
What should I do if I get this CLF-C02 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: "never". Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This CLF-C02 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 CLF-C02 exam.
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