SAA-C03 Design High-Performing Architectures Practice Question
This SAA-C03 practice question tests your understanding of design high-performing architectures. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: gp3 allows IOPS and throughput to be provisioned independently of volume size.. 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.
Exhibit
Database storage review:
- Current volume type: gp2
- Peak Read/Write IOPS observed: 9,700
- VolumeQueueLength increases during busy periods
- ReadLatency reaches 8-12 ms
- Requirement: provision about 10,000 IOPS without buying much extra capacity
Based on the exhibit, which EBS volume type should the team use to meet the performance need at lower cost than overprovisioning capacity?
Database storage review:
- Current volume type: gp2
- Peak Read/Write IOPS observed: 9,700
- VolumeQueueLength increases during busy periods
- ReadLatency reaches 8-12 ms
- Requirement: provision about 10,000 IOPS without buying much extra capacity
A
Use gp3 and provision the needed IOPS independently of volume size.
gp3 is the best fit because it lets you provision IOPS and throughput separately from volume size. The exhibit shows the workload needs around 10,000 IOPS and experiences queue buildup on gp2. With gp3, the team can raise performance without unnecessarily increasing storage capacity, which is usually more cost-effective for this kind of database workload.
B
Use sc1 because it is optimized for infrequent access and large objects.
Why wrong: sc1 is for cold, sequential workloads, not for low-latency databases that need thousands of random IOPS.
C
Use st1 because it provides high throughput for streaming data.
Why wrong: st1 is designed for throughput-heavy sequential access, not low-latency random I/O for transactional databases.
D
Use standard magnetic storage because it is compatible with all EC2 instances.
Why wrong: Magnetic storage is legacy and far below the performance needed for a database showing high IOPS and latency pressure.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use gp3 and provision the needed IOPS independently of volume size.
The gp3 volume type allows you to provision baseline performance of 3,000 IOPS and 125 MiB/s regardless of volume size, and you can independently increase IOPS up to 16,000 and throughput up to 1,000 MiB/s without needing to add more storage capacity. This decoupling of performance from size means you can meet the required IOPS at a lower cost compared to gp2, where performance scales with volume size and often forces overprovisioning of capacity to achieve the needed IOPS.
Key principle: gp3 allows IOPS and throughput to be provisioned independently of volume size.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Use gp3 and provision the needed IOPS independently of volume size.
Why this is correct
gp3 is the best fit because it lets you provision IOPS and throughput separately from volume size. The exhibit shows the workload needs around 10,000 IOPS and experiences queue buildup on gp2. With gp3, the team can raise performance without unnecessarily increasing storage capacity, which is usually more cost-effective for this kind of database workload.
Related concept
gp3 allows IOPS and throughput to be provisioned independently of volume size.
✗
Use sc1 because it is optimized for infrequent access and large objects.
Why it's wrong here
sc1 is for cold, sequential workloads, not for low-latency databases that need thousands of random IOPS.
✗
Use st1 because it provides high throughput for streaming data.
Why it's wrong here
st1 is designed for throughput-heavy sequential access, not low-latency random I/O for transactional databases.
✗
Use standard magnetic storage because it is compatible with all EC2 instances.
Why it's wrong here
Magnetic storage is legacy and far below the performance needed for a database showing high IOPS and latency pressure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume all EBS volume types require overprovisioning capacity to achieve higher IOPS, overlooking gp3's ability to independently scale performance from storage size, which is a key differentiator tested on the SAA-C03 exam.
Trap categories for this question
Command / output trap
Magnetic storage is legacy and far below the performance needed for a database showing high IOPS and latency pressure.
Detailed technical explanation
How to think about this question
Under the hood, gp3 uses a credit-based burst model for baseline performance, but unlike gp2, the baseline is fixed and does not depend on volume size; additional IOPS are provisioned as a separate, billed resource. This architecture allows you to size the volume for storage needs only, while paying only for the performance you require, which is especially beneficial in scenarios like boot volumes for burstable instances or database workloads with moderate IOPS demands. A real-world example is a web application that needs 10,000 IOPS but only 100 GB of storage—with gp2 you would need a 333 GB volume to get that IOPS, but with gp3 you can provision a 100 GB volume and add 7,000 extra IOPS at a lower cost.
KKey Concepts to Remember
gp3 allows IOPS and throughput to be provisioned independently of volume size.
gp3 offers a baseline performance of 3,000 IOPS and 125 MiB/s for any volume size.
gp3 is a cost-effective option for workloads needing high performance without large storage.
gp3 is an SSD-backed volume type suitable for a wide variety of transactional workloads.
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
gp3 allows IOPS and throughput to be provisioned independently of volume size.
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 gp3 allows IOPS and throughput to be provisioned independently of volume size., then practise related SAA-C03 questions on the same topic to reinforce the concept.
Design High-Performing Architectures — This question tests Design High-Performing Architectures — gp3 allows IOPS and throughput to be provisioned independently of volume size..
What is the correct answer to this question?
The correct answer is: Use gp3 and provision the needed IOPS independently of volume size. — The gp3 volume type allows you to provision baseline performance of 3,000 IOPS and 125 MiB/s regardless of volume size, and you can independently increase IOPS up to 16,000 and throughput up to 1,000 MiB/s without needing to add more storage capacity. This decoupling of performance from size means you can meet the required IOPS at a lower cost compared to gp2, where performance scales with volume size and often forces overprovisioning of capacity to achieve the needed IOPS.
What should I do if I get this SAA-C03 question wrong?
Review gp3 allows IOPS and throughput to be provisioned independently of volume size., then practise related SAA-C03 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
gp3 allows IOPS and throughput to be provisioned independently of volume size.
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