- A
Create an S3 lifecycle rule to transition older objects to a colder storage class after 30 days, then expire after 1 year
S3 lifecycle policies can automatically transition objects to lower-cost storage classes based on age. Transitioning after 30 days reduces ongoing storage costs because the logs are rarely accessed, while expiring after 1 year ensures you still meet the compliance retention window.
- B
Keep all logs in S3 Standard and rely on lower request rates to reduce cost
Why wrong: Request rate does not offset storage cost differences between storage classes. Keeping everything in S3 Standard is usually the most expensive option for long-term retention, even if objects are accessed rarely.
- C
Copy logs to EBS snapshots each week and delete the original files
Why wrong: EBS snapshots are intended for backing up block storage (EBS volumes). They are not the best tool for application log retention in S3 and typically add unnecessary operational complexity and retention management overhead.
- D
Use S3 replication to a second bucket in another region to reduce costs
Why wrong: Replication is meant for redundancy and cross-region availability. It generally increases cost due to replication requests and storing data in another region; it does not reduce storage-class cost for the primary copy.
Quick Answer
The answer is to create an S3 lifecycle rule that transitions logs to colder storage after 30 days and expires them after 1 year. This is correct because S3 Lifecycle policies automate both storage class transitions and object expiration, allowing you to move rarely accessed logs from S3 Standard to a lower-cost class like S3 Glacier Instant Retrieval or S3 Glacier Deep Archive after 30 days, then permanently delete them at the 1-year compliance mark—all without manual intervention. On the SAA-C03 exam, this scenario tests your understanding of cost optimization through automated lifecycle management, often appearing as a distractor where candidates mistakenly choose manual archiving or separate deletion scripts. A common trap is forgetting that expiration deletes objects, while transition only changes storage class; the rule must include both actions. Memory tip: think “Transition to save, Expire to grave”—the lifecycle handles the entire data journey from hot to cold to gone.
SAA-C03 Design Cost-Optimized Architectures Practice Question
This SAA-C03 practice question tests your understanding of design cost-optimized architectures. 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.
You store application logs in an S3 bucket. After 30 days, the logs are rarely accessed, but you must retain them for 1 year for compliance. Which S3 feature is the best way to reduce storage cost while meeting the retention requirement?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
Create an S3 lifecycle rule to transition older objects to a colder storage class after 30 days, then expire after 1 year
Option A is correct because an S3 Lifecycle rule can automatically transition objects from S3 Standard to a colder storage class (e.g., S3 Glacier Instant Retrieval or S3 Glacier Deep Archive) after 30 days, reducing storage costs for rarely accessed logs. After 1 year, the rule can expire the objects, which permanently deletes them, meeting the compliance retention requirement 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.
- ✓
Create an S3 lifecycle rule to transition older objects to a colder storage class after 30 days, then expire after 1 year
Why this is correct
S3 lifecycle policies can automatically transition objects to lower-cost storage classes based on age. Transitioning after 30 days reduces ongoing storage costs because the logs are rarely accessed, while expiring after 1 year ensures you still meet the compliance retention window.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Keep all logs in S3 Standard and rely on lower request rates to reduce cost
Why it's wrong here
Request rate does not offset storage cost differences between storage classes. Keeping everything in S3 Standard is usually the most expensive option for long-term retention, even if objects are accessed rarely.
- ✗
Copy logs to EBS snapshots each week and delete the original files
Why it's wrong here
EBS snapshots are intended for backing up block storage (EBS volumes). They are not the best tool for application log retention in S3 and typically add unnecessary operational complexity and retention management overhead.
- ✗
Use S3 replication to a second bucket in another region to reduce costs
Why it's wrong here
Replication is meant for redundancy and cross-region availability. It generally increases cost due to replication requests and storing data in another region; it does not reduce storage-class cost for the primary copy.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think S3 Standard is always the cheapest option for infrequently accessed data, but they overlook the significant cost savings from lifecycle transitions to colder storage classes like S3 Glacier Deep Archive, which are designed for long-term archival with rare access.
Detailed technical explanation
How to think about this question
S3 Lifecycle policies evaluate objects based on their creation date or the number of days since the current storage class was applied. When transitioning to a colder class like S3 Glacier Deep Archive, there is a minimum 180-day storage charge if objects are deleted early, so the 1-year retention period aligns well with that constraint. Additionally, lifecycle transitions are asynchronous and incur per-object transition costs, which are negligible compared to the savings from moving to a lower-cost tier.
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.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Cost-Optimized Architectures — This question tests Design Cost-Optimized Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create an S3 lifecycle rule to transition older objects to a colder storage class after 30 days, then expire after 1 year — Option A is correct because an S3 Lifecycle rule can automatically transition objects from S3 Standard to a colder storage class (e.g., S3 Glacier Instant Retrieval or S3 Glacier Deep Archive) after 30 days, reducing storage costs for rarely accessed logs. After 1 year, the rule can expire the objects, which permanently deletes them, meeting the compliance retention requirement without manual intervention.
What should I do if I get this SAA-C03 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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 →
Same concept, more angles
1 more ways this is tested on SAA-C03
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. An S3 bucket stores application logs. After 30 days, the team rarely accesses the logs, but compliance requires keeping them for 18 months. Which setup most directly reduces storage cost while maintaining compliance?
easy- ✓ A.Configure an S3 Lifecycle policy to transition objects to a colder storage class after 30 days and expire (delete) them after 18 months.
- B.Enable S3 Versioning and rely on deleting old versions after 30 days to reduce storage costs while keeping the latest data.
- C.Move the bucket to a different AWS region farther from the users to reduce the likelihood of accidental reads and thereby lower storage costs.
- D.Switch all objects to S3 Glacier Instant Retrieval immediately, regardless of object age, to minimize storage charges.
Why A: Option A is correct because S3 Lifecycle policies allow you to automatically transition objects to cheaper storage classes (e.g., S3 Standard-IA or S3 Glacier Deep Archive) after 30 days, reducing storage costs for rarely accessed logs. The policy also sets an expiration action to delete objects after 18 months, meeting the compliance requirement without manual intervention.
Last reviewed: Jun 11, 2026
This SAA-C03 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 SAA-C03 exam.
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