The answer is S3 Lifecycle policies with expiration rules, which allow you to automatically delete S3 objects after a specified number of days to reduce storage costs. This feature works by defining a rule that transitions objects through storage classes or directly sets an expiration action, removing data like old logs or temporary files without manual intervention. On the AWS Certified Cloud Practitioner CLF-C02 exam, this tests your understanding of cost-optimization services, often appearing in scenario-based questions where you must choose the most efficient way to manage stale data. A common trap is confusing Lifecycle policies with S3 Intelligent-Tiering, which moves data between tiers but does not delete it. Remember the mnemonic "Expire to Retire": if you need to retire old objects, set an expiration rule in your Lifecycle policy.
CLF-C02 Cloud Technology and Services Practice Question
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.
Which Amazon S3 feature allows you to automatically delete objects after a specified number of days to reduce storage costs?
Why wrong: Versioning preserves all versions of objects — without also configuring lifecycle expiration rules, it increases rather than decreases storage costs.
B
S3 Lifecycle policies with expiration rules
Lifecycle expiration rules automatically delete objects (or their versions) after a specified number of days, reducing storage costs for data with defined retention periods.
C
S3 Object Lock
Why wrong: Object Lock prevents deletion for a retention period — it's the opposite of automatic deletion.
D
S3 Block Public Access
Why wrong: Block Public Access controls access permissions — it doesn't manage object lifecycle or deletion.
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 with expiration rules
S3 Lifecycle policies with expiration rules allow you to define rules that automatically delete objects after a specified number of days. This is a cost-optimization feature that helps reduce storage costs by removing data that is no longer needed, such as logs or temporary files, 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 preserves all versions of objects — without also configuring lifecycle expiration rules, it increases rather than decreases storage costs.
✓
S3 Lifecycle policies with expiration rules
Why this is correct
Lifecycle expiration rules automatically delete objects (or their versions) after a specified number of days, reducing storage costs for data with defined retention periods.
Related concept
Read the scenario before looking for a memorised answer.
✗
S3 Object Lock
Why it's wrong here
Object Lock prevents deletion for a retention period — it's the opposite of automatic deletion.
✗
S3 Block Public Access
Why it's wrong here
Block Public Access controls access permissions — it doesn't manage object lifecycle or deletion.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse S3 Lifecycle policies with S3 Versioning, mistakenly thinking versioning alone can delete old versions to save costs, but versioning actually retains all versions and requires a Lifecycle policy with noncurrent version expiration to remove them.
Detailed technical explanation
How to think about this question
S3 Lifecycle policies consist of transition actions (e.g., moving objects to S3 Glacier Deep Archive after 30 days) and expiration actions (e.g., deleting objects after 365 days). The expiration action is evaluated daily by an asynchronous process, and objects are deleted permanently—there is no recovery via S3 Versioning unless versioning was enabled before the deletion. A real-world scenario is automatically deleting log files older than 90 days to comply with data retention policies while minimizing S3 Standard storage costs.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CLF-C02 question in full detail.
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 policies with expiration rules — S3 Lifecycle policies with expiration rules allow you to define rules that automatically delete objects after a specified number of days. This is a cost-optimization feature that helps reduce storage costs by removing data that is no longer needed, such as logs or temporary files, 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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company stores compliance logs in Amazon S3. After 90 days, logs are never accessed again but must be retained for 7 years to meet regulatory requirements. Which S3 storage class provides the lowest storage cost for this long-term archival requirement?
medium
A.S3 Standard
B.S3 Standard-IA
C.S3 Glacier Flexible Retrieval
✓ D.S3 Glacier Deep Archive
Why D: Amazon S3 Glacier Deep Archive is designed for long-term retention of data that is accessed extremely rarely, with a retrieval time of 12 hours or more. It offers the lowest storage cost among all S3 storage classes, making it the most cost-effective choice for compliance logs that must be retained for 7 years but are never accessed after 90 days.
Variation 2. 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?
medium
A.S3 Versioning
✓ B.S3 Lifecycle policy
C.S3 Intelligent-Tiering
D.S3 Event Notification
Why B: 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.
Last reviewed: Jun 11, 2026
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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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