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.
A marketing site stores logs in S3. Logs are queried for 30 days, rarely accessed for one year, and then retained for compliance. What should reduce storage cost? The architecture review board prefers a managed AWS-native control.
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 that transitions objects to lower-cost storage classes over time
Option A is correct because an S3 Lifecycle policy is a managed AWS-native feature that automatically transitions objects to lower-cost storage classes (e.g., S3 Standard-IA after 30 days, S3 Glacier Instant Retrieval or S3 Glacier Flexible Retrieval after one year) based on age, reducing storage costs while maintaining compliance. This aligns with the access pattern: frequent queries for 30 days, rare access for a year, then long-term retention. It avoids manual intervention and optimizes cost without sacrificing availability or retrieval needs.
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 lifecycle policy that transitions objects to lower-cost storage classes over time
Why this is correct
Lifecycle rules automate transitions based on age, matching storage cost to access patterns.
Related concept
Read the scenario before looking for a memorised answer.
✗
Keep all logs in S3 Standard indefinitely
Why it's wrong here
S3 Standard is more expensive for rarely accessed archival data.
✗
Use EBS snapshots for the logs
Why it's wrong here
EBS snapshots are not the right storage model for application log objects.
✗
Move all logs immediately to S3 Glacier Deep Archive
Why it's wrong here
Immediate deep archive can make recent query access slow and expensive.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may choose Option D (immediate move to Glacier Deep Archive) thinking it maximizes cost savings, but they overlook the 30-day query requirement, which necessitates a storage class that supports frequent access (like S3 Standard-IA) before transitioning to archival storage.
Detailed technical explanation
How to think about this question
S3 Lifecycle policies use actions like 'Transition' to move objects between storage classes (e.g., from S3 Standard to S3 Standard-IA after 30 days, then to S3 Glacier Deep Archive after 365 days) based on object age, with a minimum 30-day transition rule between certain classes. Under the hood, S3 tracks object creation dates and applies transitions asynchronously, typically within 24 hours of the policy's effective date. In a real-world scenario, a marketing site generating 10 TB of logs monthly could reduce costs by over 80% by transitioning to S3 Glacier Deep Archive after one year, versus keeping all data in S3 Standard.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: S3 lifecycle policy that transitions objects to lower-cost storage classes over time — Option A is correct because an S3 Lifecycle policy is a managed AWS-native feature that automatically transitions objects to lower-cost storage classes (e.g., S3 Standard-IA after 30 days, S3 Glacier Instant Retrieval or S3 Glacier Flexible Retrieval after one year) based on age, reducing storage costs while maintaining compliance. This aligns with the access pattern: frequent queries for 30 days, rare access for a year, then long-term retention. It avoids manual intervention and optimizes cost without sacrificing availability or retrieval needs.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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