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.
A media archive requires consistent high IOPS for a transactional database on EC2. Which EBS volume type is most suitable?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Provisioned IOPS SSD such as io2
The scenario requires consistent high IOPS for a transactional database, which demands low-latency, predictable performance. Provisioned IOPS SSD volumes like io2 are designed specifically for such workloads, offering up to 256,000 IOPS per volume with 99.999% durability, making them the most suitable choice for consistent high IOPS.
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.
✓
Provisioned IOPS SSD such as io2
Why this is correct
io2 is designed for business-critical workloads requiring consistent high IOPS and durability.
Related concept
Read the scenario before looking for a memorised answer.
✗
st1 Throughput Optimized HDD
Why it's wrong here
st1 is for throughput-oriented sequential workloads, not high-IOPS transactional databases.
✗
Instance store only
Why it's wrong here
Instance store can be fast but is ephemeral and not generally suitable for durable databases.
✗
sc1 Cold HDD
Why it's wrong here
sc1 is low-cost cold storage with lower performance.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse throughput-optimized HDD (st1) with IOPS-focused workloads, mistakenly thinking high throughput equals high IOPS, but IOPS measures random access operations while throughput measures sequential data transfer, and transactional databases require low-latency random I/O.
Detailed technical explanation
How to think about this question
io2 volumes use a dedicated IOPS allocation model where you provision IOPS independently of storage size, allowing up to 1,000 IOPS per GiB. Under the hood, they leverage a Non-Volatile Memory Express (NVMe) interface on Nitro-based instances for lower latency, and the 99.999% durability is achieved through replication within an Availability Zone. In a real-world scenario, a high-traffic e-commerce platform's order database would use io2 to ensure sub-millisecond latency during peak loads, whereas st1 would cause unacceptable latency spikes due to its burst-bucket model.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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: Provisioned IOPS SSD such as io2 — The scenario requires consistent high IOPS for a transactional database, which demands low-latency, predictable performance. Provisioned IOPS SSD volumes like io2 are designed specifically for such workloads, offering up to 256,000 IOPS per volume with 99.999% durability, making them the most suitable choice for consistent high IOPS.
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.
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Question Discussion
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