- A
Amazon EFS mounted on EC2
Why wrong: EFS provides NFS file access but doesn't offer the high-performance parallel file system throughput required for petabyte-scale HPC bioinformatics workloads.
- B
Amazon FSx for Lustre linked to S3
FSx for Lustre is a high-performance parallel file system that integrates with S3 — it presents S3 data as files with POSIX semantics and delivers the throughput needed for genomics HPC workloads.
- C
Amazon EBS io2 volumes on EC2
Why wrong: EBS volumes are single-instance block storage — they don't provide the shared parallel file system access or S3 integration needed for genomics HPC.
- D
Amazon S3 with S3 Select
Why wrong: S3 Select queries data within S3 objects — it doesn't provide a POSIX file system interface for standard bioinformatics tools that expect a file system.
Quick Answer
The answer is Amazon FSx for Lustre linked to S3. This is the correct choice because it provides a high-performance file system with a POSIX-compliant interface, allowing standard bioinformatics tools to directly access and analyze petabyte-scale genomics data stored in S3 without requiring data movement. FSx for Lustre delivers the low-latency, high-throughput needed for complex analytics, while its seamless S3 integration treats S3 as a durable backing store. On the AWS Certified Cloud Practitioner CLF-C02 exam, this scenario tests your understanding of how to bridge object storage with POSIX-based workloads—a common trap is assuming Amazon EFS or EBS can handle S3-linked analytics at this scale, but they lack Lustre’s optimized throughput for massive datasets. Remember the memory tip: “Lustre loves large S3 loads for low-latency POSIX processing.”
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 stores genomics data (several petabytes) on Amazon S3. They need to run complex analytics on this data using standard bioinformatics tools that require a POSIX file system interface. Which AWS solution provides this?
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
Amazon FSx for Lustre linked to S3
Amazon FSx for Lustre is a high-performance file system that provides a POSIX-compliant interface and can be linked directly to an S3 bucket, allowing you to run standard bioinformatics tools on genomics data stored in S3 without needing to copy it. This solution delivers the low-latency, high-throughput file access required for complex analytics on petabyte-scale datasets, while seamlessly integrating with S3 for durable storage.
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 EFS mounted on EC2
Why it's wrong here
EFS provides NFS file access but doesn't offer the high-performance parallel file system throughput required for petabyte-scale HPC bioinformatics workloads.
- ✓
Amazon FSx for Lustre linked to S3
Why this is correct
FSx for Lustre is a high-performance parallel file system that integrates with S3 — it presents S3 data as files with POSIX semantics and delivers the throughput needed for genomics HPC workloads.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon EBS io2 volumes on EC2
Why it's wrong here
EBS volumes are single-instance block storage — they don't provide the shared parallel file system access or S3 integration needed for genomics HPC.
- ✗
Amazon S3 with S3 Select
Why it's wrong here
S3 Select queries data within S3 objects — it doesn't provide a POSIX file system interface for standard bioinformatics tools that expect a file system.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse Amazon EFS (a POSIX file system) with the high-performance requirements of HPC workloads, overlooking that FSx for Lustre is specifically optimized for low-latency, parallel access to large datasets, while EFS is designed for general-purpose, throughput-oriented use cases.
Detailed technical explanation
How to think about this question
FSx for Lustre is built on the Lustre parallel file system, which uses a distributed metadata and object storage architecture to deliver sub-millisecond latencies and hundreds of GB/s of throughput, making it ideal for genomics workloads like variant calling or sequence alignment. When linked to S3, it creates a 'data repository association' that transparently presents S3 objects as files, with lazy loading of data on first access and optional asynchronous export of results back to S3, enabling a hybrid cloud storage pattern without data duplication.
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
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon FSx for Lustre linked to S3 — Amazon FSx for Lustre is a high-performance file system that provides a POSIX-compliant interface and can be linked directly to an S3 bucket, allowing you to run standard bioinformatics tools on genomics data stored in S3 without needing to copy it. This solution delivers the low-latency, high-throughput file access required for complex analytics on petabyte-scale datasets, while seamlessly integrating with S3 for durable storage.
What should I do if I get this CLF-C02 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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Last reviewed: Jun 11, 2026
This CLF-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CLF-C02 exam.
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