The answer is to use gp3, as it is the cost-effective EBS volume type that avoids overprovisioning capacity. Unlike gp2, where IOPS scale linearly with volume size at a rate of 3 IOPS per GiB, gp3 decouples performance from storage, allowing you to provision a baseline of 3,000 IOPS and 125 MiB/s throughput for any volume size and independently scale IOPS up to 16,000 and throughput up to 1,000 MiB/s without increasing capacity. On the SAA-C03 exam, this question tests your understanding of how gp3’s independent performance provisioning directly addresses the cost inefficiency of overprovisioning large gp2 volumes just to meet IOPS requirements. A common trap is assuming gp2 is always cheaper for small volumes, but gp3’s lower base price and granular control make it the better choice for most workloads. Memory tip: think “gp3 = three freedoms” — free from volume size constraints, free to scale IOPS and throughput independently, and free from overprovisioning costs.
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. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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 team needs to meet performance requirements at lower cost than overprovisioning capacity. gp3 allows you to provision baseline performance of 3,000 IOPS and 125 MiB/s throughput for any volume size, and you can independently increase IOPS up to 16,000 and throughput up to 1,000 MiB/s without needing to increase volume size. This avoids the cost of overprovisioning large gp2 volumes to achieve higher IOPS, which are tied to volume size (3 IOPS per GiB).
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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
Read the scenario before looking for a memorised answer.
✗
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, forgetting that gp3 decouples performance from size, making it the most cost-effective choice for workloads needing specific IOPS without large storage.
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
gp3 uses a non-volatile memory express (NVMe) block storage architecture under the hood, decoupling IOPS and throughput from volume size, which is a fundamental shift from gp2's credit-bucket model tied to volume size. This means you can provision a small 1 GiB gp3 volume with 16,000 IOPS, whereas a gp2 volume would need over 5,334 GiB to achieve the same IOPS, resulting in massive cost savings. In real-world scenarios, this is critical for boot volumes or small databases that need high IOPS but not large storage capacity.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Design High-Performing Architectures — This question tests Design High-Performing Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use gp3 and provision the needed IOPS independently of volume size. — The team needs to meet performance requirements at lower cost than overprovisioning capacity. gp3 allows you to provision baseline performance of 3,000 IOPS and 125 MiB/s throughput for any volume size, and you can independently increase IOPS up to 16,000 and throughput up to 1,000 MiB/s without needing to increase volume size. This avoids the cost of overprovisioning large gp2 volumes to achieve higher IOPS, which are tied to volume size (3 IOPS per GiB).
What should I do if I get this SAA-C03 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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. Based on the exhibit, which EBS volume type should the team use to meet the performance need at lower cost than overprovisioning capacity?
easy
✓ A.Use gp3 and provision the needed IOPS independently of volume size.
B.Use sc1 because it is optimized for infrequent access and large objects.
C.Use st1 because it provides high throughput for streaming data.
D.Use standard magnetic storage because it is compatible with all EC2 instances.
Why A: 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.
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Question Discussion
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