- A
Change the EBS volumes to io2 Block Express volumes with provisioned IOPS.
io2 Block Express provides consistent low latency and high IOPS, critical for SAP HANA.
- B
Increase the instance size to r5.8xlarge.
Why wrong: More CPU/memory may help but the bottleneck is likely I/O.
- C
Disable the EBS volume caching.
Why wrong: Disabling caching would degrade performance.
- D
Create a RAID 0 stripe of multiple gp2 volumes.
Why wrong: RAID 0 improves throughput but gp2 still has variable latency.
Question 1,218 of 1,733
PAS-C01 Technology Practice Question
This PAS-C01 practice question tests your understanding of technology. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 company is running an SAP HANA database on an Amazon EC2 instance. The instance type is r5.4xlarge with 16 vCPUs and 128 GiB of memory. The storage is configured with a single 400 GB gp2 EBS volume for /hana/data and a separate 100 GB gp2 volume for /hana/log. The database experiences high latency during peak loads. Which change will most likely improve performance?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
✓
Change the EBS volumes to io2 Block Express volumes with provisioned IOPS.
SAP HANA on EC2 requires consistently low latency for /hana/data and /hana/log volumes, especially under peak loads. The gp2 volume's burst model can deplete credits, causing throughput throttling and high latency. io2 Block Express volumes provide consistent, provisioned IOPS performance without reliance on burst credits, directly addressing the latency issue.
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.
- ✓
Change the EBS volumes to io2 Block Express volumes with provisioned IOPS.
Why this is correct
io2 Block Express provides consistent low latency and high IOPS, critical for SAP HANA.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Increase the instance size to r5.8xlarge.
Why it's wrong here
More CPU/memory may help but the bottleneck is likely I/O.
- ✗
Disable the EBS volume caching.
Why it's wrong here
Disabling caching would degrade performance.
- ✗
Create a RAID 0 stripe of multiple gp2 volumes.
Why it's wrong here
RAID 0 improves throughput but gp2 still has variable latency.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume increasing instance size (Option B) will resolve all performance issues, overlooking that SAP HANA's high-latency problem under peak load is typically storage-bound, not compute-bound, and that gp2's burst model is the root cause.
Detailed technical explanation
How to think about this question
gp2 volumes use a burst bucket model where each volume earns 3 IOPS per GiB (up to 16,000 IOPS) and can burst to 3,000 IOPS for short periods. Once credits are exhausted, performance drops to baseline (e.g., 400 GiB volume = 1,200 IOPS baseline). io2 Block Express volumes, designed for SAP HANA, deliver up to 256,000 IOPS per volume with sub-millisecond latency and are backed by a dedicated Nitro controller, ensuring consistent performance for latency-sensitive database workloads.
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.
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FAQ
Questions learners often ask
What does this PAS-C01 question test?
Technology — This question tests Technology — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Change the EBS volumes to io2 Block Express volumes with provisioned IOPS. — SAP HANA on EC2 requires consistently low latency for /hana/data and /hana/log volumes, especially under peak loads. The gp2 volume's burst model can deplete credits, causing throughput throttling and high latency. io2 Block Express volumes provide consistent, provisioned IOPS performance without reliance on burst credits, directly addressing the latency issue.
What should I do if I get this PAS-C01 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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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