- A
Amazon EBS General Purpose (gp3) volumes to persist intermediate results across reboots.
Why wrong: EBS is durable across reboots, which is unnecessary cost and doesn’t maximize local scratch throughput.
- B
Amazon EFS for a shared file system between multiple instances.
Why wrong: EFS is for shared, durable storage and typically adds network latency compared with local scratch needs.
- C
Instance store for local temporary files that can be lost when the instance stops.
Instance store is designed for temporary high-performance local storage and is acceptable when loss is tolerable.
- D
Amazon S3 for scratch data so it is always durable and accessible from anywhere.
Why wrong: S3 is durable but not optimized for the lowest-latency scratch I/O pattern inside a single compute node.
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 compute workload uses temporary scratch space for intermediate results (reproducible), and it can tolerate data loss if the instance is terminated. The workload benefits from very high local I/O throughput. Which storage option is the best fit for the scratch data?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Instance store for local temporary files that can be lost when the instance stops.
Instance store volumes provide very high local I/O throughput because they are physically attached to the host server, making them ideal for temporary scratch data that is reproducible and can tolerate loss. Since the workload explicitly accepts data loss on instance termination and does not require persistence across reboots, instance store is the best fit for this use case.
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.
- ✗
Amazon EBS General Purpose (gp3) volumes to persist intermediate results across reboots.
Why it's wrong here
EBS is durable across reboots, which is unnecessary cost and doesn’t maximize local scratch throughput.
- ✗
Amazon EFS for a shared file system between multiple instances.
Why it's wrong here
EFS is for shared, durable storage and typically adds network latency compared with local scratch needs.
When this WOULD be correct
A question where multiple instances need to concurrently access and share temporary files with low administrative overhead, and the workload can tolerate network latency. For example, a distributed data processing job that requires a common scratch space across nodes.
- ✓
Instance store for local temporary files that can be lost when the instance stops.
Why this is correct
Instance store is designed for temporary high-performance local storage and is acceptable when loss is tolerable.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon S3 for scratch data so it is always durable and accessible from anywhere.
Why it's wrong here
S3 is durable but not optimized for the lowest-latency scratch I/O pattern inside a single compute node.
When this WOULD be correct
A scenario where the workload requires durable, scalable, and accessible storage for data that must persist across instance terminations and be shared across multiple applications or regions, such as storing backup files or static website assets.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The SAA-C03 exam frequently reuses these exact scenarios with slightly different constraints.
✓Instance store for local temporary files that can be lost when the instance stops.Correct answer▾
Why this is correct
Instance store is designed for temporary high-performance local storage and is acceptable when loss is tolerable.
✗Amazon EFS for a shared file system between multiple instances.Wrong answer — click to see why▾
Why this is wrong here
Amazon EFS provides a shared file system, but the question specifies scratch data for a single instance that benefits from very high local I/O throughput. EFS is network-attached and has higher latency than local storage, making it unsuitable for high local I/O needs.
★ When this WOULD be the correct answer
A question where multiple instances need to concurrently access and share temporary files with low administrative overhead, and the workload can tolerate network latency. For example, a distributed data processing job that requires a common scratch space across nodes.
Why candidates choose this
Candidates may think a shared file system is beneficial for any temporary data, overlooking that the question emphasizes local I/O throughput and single-instance scratch space, not multi-instance sharing.
✗Amazon S3 for scratch data so it is always durable and accessible from anywhere.Wrong answer — click to see why▾
Why this is wrong here
Amazon S3 is designed for durable, highly available object storage with high latency, not for high local I/O throughput scratch space. It cannot provide the very high local I/O performance required for temporary scratch data.
★ When this WOULD be the correct answer
A scenario where the workload requires durable, scalable, and accessible storage for data that must persist across instance terminations and be shared across multiple applications or regions, such as storing backup files or static website assets.
Why candidates choose this
Candidates may think S3's durability and accessibility make it suitable for any data, overlooking the specific need for high local I/O throughput and the tolerance for data loss in this scratch data use case.
Analysis generated from the official SAA-C03blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose EBS gp3 (Option A) because they assume all block storage is persistent and high-performance, overlooking the fact that instance store offers even higher local throughput and is explicitly designed for temporary, loss-tolerant workloads.
Detailed technical explanation
How to think about this question
Instance store volumes are ephemeral block storage that reside on disks physically attached to the host EC2 instance, providing direct NVMe or SATA access with extremely low latency and high IOPS (e.g., up to 3.3 million IOPS for some instance types). They are ideal for scenarios like large-scale data processing, caching, or temporary sort/merge operations where data can be regenerated from source. However, data is lost when the instance is stopped, terminated, or fails, so they must not be used for critical or non-reproducible data.
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.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
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: Instance store for local temporary files that can be lost when the instance stops. — Instance store volumes provide very high local I/O throughput because they are physically attached to the host server, making them ideal for temporary scratch data that is reproducible and can tolerate loss. Since the workload explicitly accepts data loss on instance termination and does not require persistence across reboots, instance store is the best fit for this use case.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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