The answer is an S3 lifecycle policy that transitions objects to lower-cost storage classes over time. This is correct because it automates the movement of log data from S3 Standard to S3 Standard-IA after 30 days of frequent queries, then to S3 Glacier Deep Archive after a year of rare access, directly aligning with the access pattern to minimize storage costs without manual intervention. On the SAA-C03 exam, this scenario tests your understanding of lifecycle rules as a cost optimization strategy, often appearing in questions about log storage or archival compliance—a common trap is choosing manual class changes or expiration alone, which misses the automation and tiered cost savings. Remember the memory tip: “30 days hot, one year cool, then deep freeze” to recall the transition sequence from Standard to IA to Glacier Deep Archive.
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. 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 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?
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
An S3 Lifecycle policy automates the transition of objects from S3 Standard (frequently accessed) to lower-cost storage classes like S3 Standard-IA (infrequent access) after 30 days, then to S3 Glacier Deep Archive for long-term compliance retention. This matches the access pattern: frequent queries for 30 days, rare access for a year, then archival storage, minimizing cost without manual intervention.
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
S3 Lifecycle policies automate object transitions between storage classes.
✗
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 might choose immediate archiving (Option D) to minimize storage cost, overlooking the 30-day query requirement and the retrieval latency/cost of Glacier Deep Archive, or mistakenly think EBS snapshots (Option C) are a valid alternative for log storage.
Detailed technical explanation
How to think about this question
S3 Lifecycle policies use transition actions based on object age (days since creation) to move data between storage classes, with minimum transition days (e.g., 30 days from Standard to Standard-IA). The S3 Glacier Deep Archive class has a 180-day minimum storage duration charge, so transitioning logs after one year avoids early deletion fees while meeting compliance retention. In a real-world scenario, you might also use an S3 Lifecycle expiration action to delete logs after the compliance period ends, further reducing costs.
KKey Concepts to Remember
S3 Lifecycle policies automate object transitions between storage classes.
Policies are based on object age or prefix.
Transitions reduce costs by matching data access patterns.
S3 Standard-IA, Glacier Flexible Retrieval, and Glacier Deep Archive offer progressively lower costs for less frequent access.
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 — An S3 Lifecycle policy automates the transition of objects from S3 Standard (frequently accessed) to lower-cost storage classes like S3 Standard-IA (infrequent access) after 30 days, then to S3 Glacier Deep Archive for long-term compliance retention. This matches the access pattern: frequent queries for 30 days, rare access for a year, then archival storage, minimizing cost 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.
About these practice questions
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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 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?
medium
A.Keep all logs in S3 Standard indefinitely
B.Move all logs immediately to S3 Glacier Deep Archive
✓ C.S3 lifecycle policy that transitions objects to lower-cost storage classes over time
D.Use EBS snapshots for the logs
Why C: Option C is correct because an S3 Lifecycle policy automates the transition of objects from S3 Standard (for frequent access) to S3 Standard-IA (infrequent access) after 30 days, then to S3 Glacier Deep Archive (for long-term retention) after one year, minimizing storage costs while maintaining data accessibility as needed.
Variation 2. 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.
medium
A.Keep all logs in S3 Standard indefinitely
B.Move all logs immediately to S3 Glacier Deep Archive
✓ C.S3 lifecycle policy that transitions objects to lower-cost storage classes over time
D.Use EBS snapshots for the logs
Why C: 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.
Variation 3. 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 design must avoid adding custom operational scripts.
medium
A.Keep all logs in S3 Standard indefinitely
B.Move all logs immediately to S3 Glacier Deep Archive
✓ C.S3 lifecycle policy that transitions objects to lower-cost storage classes over time
D.Use EBS snapshots for the logs
Why C: Option C is correct because S3 lifecycle policies automate the transition of objects between storage classes based on age, allowing logs to move from S3 Standard (for frequent querying) to S3 Standard-IA or S3 One Zone-IA (for rare access), and eventually to S3 Glacier Deep Archive (for long-term compliance retention). This reduces storage cost without custom scripts, aligning with the requirement to avoid operational overhead.
Variation 4. 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 design must avoid adding custom operational scripts.
medium
✓ A.S3 lifecycle policy that transitions objects to lower-cost storage classes over time
B.Keep all logs in S3 Standard indefinitely
C.Use EBS snapshots for the logs
D.Move all logs immediately to S3 Glacier Deep Archive
Why A: Option A is correct because S3 Lifecycle policies allow you to automatically transition objects from S3 Standard to lower-cost storage classes like S3 Standard-IA (Infrequent Access) after 30 days, then to S3 Glacier Deep Archive after one year, without custom scripts. This matches the access pattern: frequent queries for 30 days, rare access for a year, then long-term retention for compliance. The policy automates cost reduction by moving data to progressively cheaper storage as access frequency decreases.
Variation 5. 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.
medium
✓ A.S3 lifecycle policy that transitions objects to lower-cost storage classes over time
B.Keep all logs in S3 Standard indefinitely
C.Use EBS snapshots for the logs
D.Move all logs immediately to S3 Glacier Deep Archive
Why A: 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.
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