SAA-C03 Design Cost-Optimized Architectures Practice Question
This SAA-C03 practice question tests your understanding of design cost-optimized architectures. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: cloudWatch Logs retention policies are configured per log group.. 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 risk simulation workload uses CloudWatch Logs heavily. Retaining all debug logs forever is increasing costs. What should be configured? 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
✓
CloudWatch Logs retention policies per log group
CloudWatch Logs retention policies allow you to set per-log-group expiration rules (e.g., 30 days, 90 days) to automatically delete old log events, directly reducing storage costs for debug logs that are no longer needed. This is a managed, AWS-native control that requires no custom scripts or external tools, aligning with the architecture review board's preference.
Key principle: CloudWatch Logs retention policies are configured per log group.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
CloudWatch Logs retention policies per log group
Why this is correct
Retention policies automatically delete older logs after the required period.
Related concept
CloudWatch Logs retention policies are configured per log group.
✗
AWS Config aggregation
Why it's wrong here
Config aggregation does not control CloudWatch Logs retention.
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CloudWatch detailed monitoring on all instances
Why it's wrong here
Detailed monitoring increases metric granularity and may increase cost.
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Route 53 health checks
Why it's wrong here
Health checks monitor endpoints and do not manage log storage.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse CloudWatch Logs retention policies with CloudWatch metric retention (which is fixed at 15 months and cannot be changed), leading them to overlook the simple, cost-effective per-log-group expiration setting.
Detailed technical explanation
How to think about this question
CloudWatch Logs retention policies operate at the log group level, with a default setting of 'Never Expire' that must be explicitly changed to a finite number of days (1 to 10 years, or 1, 3, 5, 7, 14, 30, 60, 90, 120, 150, 180, 365, 400, 545, 731, 1827, 3653). Under the hood, AWS applies the retention policy asynchronously, deleting log events that exceed the specified age within a few hours; this is crucial for workloads generating high-volume debug logs where even a few days of extra retention can significantly inflate costs.
KKey Concepts to Remember
CloudWatch Logs retention policies are configured per log group.
Retention periods range from 1 day to 10 years, or 'Never Expire'.
Logs older than the specified period are automatically deleted.
This is a managed, AWS-native cost control for log storage.
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
CloudWatch Logs retention policies are configured per log group.
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 cloudWatch Logs retention policies are configured per log group., 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 — CloudWatch Logs retention policies are configured per log group..
What is the correct answer to this question?
The correct answer is: CloudWatch Logs retention policies per log group — CloudWatch Logs retention policies allow you to set per-log-group expiration rules (e.g., 30 days, 90 days) to automatically delete old log events, directly reducing storage costs for debug logs that are no longer needed. This is a managed, AWS-native control that requires no custom scripts or external tools, aligning with the architecture review board's preference.
What should I do if I get this SAA-C03 question wrong?
Review cloudWatch Logs retention policies are configured per log group., then practise related SAA-C03 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
CloudWatch Logs retention policies are configured per log group.
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Question Discussion
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