SAA-C03 Design Cost-Optimized Architectures Practice Question
This SAA-C03 practice question tests your understanding of design cost-optimized architectures. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: s3 Lifecycle policies automate object transitions between storage classes.. 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 test environment 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 C is correct because S3 Lifecycle policies allow you to automate the transition of objects from S3 Standard to lower-cost storage classes like S3 Standard-IA (after 30 days) and then to S3 Glacier Deep Archive (after one year) for long-term compliance. This matches the access pattern of frequent queries for 30 days, rare access for a year, and then retention-only, minimizing storage costs without manual intervention.
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Keep all logs in S3 Standard indefinitely
Why it's wrong here
S3 Standard is more expensive for rarely accessed archival data.
✗
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.
✓
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
S3 Lifecycle policies automate object transitions between storage classes.
✗
Use EBS snapshots for the logs
Why it's wrong here
EBS snapshots are not the right storage model for application log objects.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may choose Option B (immediate move to Glacier Deep Archive) thinking it maximizes cost savings, but they overlook the requirement for 30 days of queryable access, which Glacier Deep Archive cannot support due to its multi-hour retrieval times.
Detailed technical explanation
How to think about this question
S3 Lifecycle policies use transition actions that move objects between storage classes based on age, with minimum 30-day periods for transitions to S3 Standard-IA and 90 days for S3 Glacier Deep Archive. The policy can also include expiration actions to delete objects after a specified period, ensuring compliance retention without manual cleanup. In practice, you can combine transitions and expiration in a single policy, e.g., transition to S3 Standard-IA after 30 days, to S3 Glacier Deep Archive after 365 days, and expire after 730 days, optimizing cost for the described access pattern.
KKey Concepts to Remember
S3 Lifecycle policies automate object transitions between storage classes.
Policies can be based on object age or prefix.
Transitions reduce storage costs by matching access patterns.
S3 Lifecycle policies can also expire objects.
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
S3 Lifecycle policies automate object transitions between storage classes.
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.
Review s3 Lifecycle policies automate object transitions between storage classes., then practise related SAA-C03 questions on the same topic to reinforce the concept.
Design Cost-Optimized Architectures — This question tests Design Cost-Optimized Architectures — S3 Lifecycle policies automate object transitions between storage classes..
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 C is correct because S3 Lifecycle policies allow you to automate the transition of objects from S3 Standard to lower-cost storage classes like S3 Standard-IA (after 30 days) and then to S3 Glacier Deep Archive (after one year) for long-term compliance. This matches the access pattern of frequent queries for 30 days, rare access for a year, and then retention-only, minimizing storage costs without manual intervention.
What should I do if I get this SAA-C03 question wrong?
Review s3 Lifecycle policies automate object transitions between storage classes., then practise related SAA-C03 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
S3 Lifecycle policies automate object transitions between storage classes.
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