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: aWS Graviton instances use ARM-based processors designed by AWS.. 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 runs on x86 EC2 instances and uses open-source software with no architecture-specific licensing restriction. What should be evaluated to reduce compute cost? The design must avoid adding custom operational scripts.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Graviton-based instances after performance testing
Option B is correct because AWS Graviton-based instances (ARM architecture) offer up to 40% better price-performance compared to x86 instances for many workloads. Since the environment uses open-source software with no architecture-specific licensing restrictions, migrating to Graviton after performance testing can significantly reduce compute costs without requiring custom operational scripts, as AWS provides native support for ARM-based instances.
Key principle: AWS Graviton instances use ARM-based processors designed by AWS.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Cross-Region data replication for all data
Why it's wrong here
Replication improves resilience but adds transfer and storage cost.
✓
AWS Graviton-based instances after performance testing
Why this is correct
Graviton instances often provide better price performance for compatible workloads.
Related concept
AWS Graviton instances use ARM-based processors designed by AWS.
✗
io2 Block Express volumes for all instances
Why it's wrong here
High-end block storage increases cost unless required by performance needs.
✗
Dedicated Hosts by default
Why it's wrong here
Dedicated Hosts are usually chosen for licensing or isolation, not basic cost reduction.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse cost optimization with performance improvement or licensing requirements, leading them to select Dedicated Hosts or high-performance storage options that actually increase costs.
Detailed technical explanation
How to think about this question
AWS Graviton processors are based on ARM Neoverse cores and are custom-designed by AWS to deliver efficient performance for cloud workloads. Performance testing is critical because not all open-source software is fully optimized for ARM; for example, certain cryptographic libraries or memory-intensive applications may require recompilation or tuning. In a real-world scenario, a web server running on x86 could be migrated to Graviton after verifying that the application stack (e.g., Nginx, Python, MySQL) compiles and runs without issues, achieving cost savings without operational overhead.
KKey Concepts to Remember
AWS Graviton instances use ARM-based processors designed by AWS.
Graviton often provides better price-performance than x86 instances for compatible workloads.
Migration to Graviton is simpler for open-source software without architecture-specific licenses.
Performance testing is recommended before migrating production workloads to Graviton.
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
AWS Graviton instances use ARM-based processors designed by AWS.
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 aWS Graviton instances use ARM-based processors designed by AWS., 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 — AWS Graviton instances use ARM-based processors designed by AWS..
What is the correct answer to this question?
The correct answer is: AWS Graviton-based instances after performance testing — Option B is correct because AWS Graviton-based instances (ARM architecture) offer up to 40% better price-performance compared to x86 instances for many workloads. Since the environment uses open-source software with no architecture-specific licensing restrictions, migrating to Graviton after performance testing can significantly reduce compute costs without requiring custom operational scripts, as AWS provides native support for ARM-based instances.
What should I do if I get this SAA-C03 question wrong?
Review aWS Graviton instances use ARM-based processors designed by AWS., then practise related SAA-C03 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
AWS Graviton instances use ARM-based processors designed by AWS.
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Question Discussion
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