SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. 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 company is designing a new container-based application using Amazon EKS. The application requires persistent storage for stateful workloads, such as databases. The storage must be highly available and durable across multiple Availability Zones. Which storage solution should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Amazon EFS with the EFS CSI driver.
Amazon EFS provides a fully managed, elastic NFS file system that is accessible from multiple Amazon EKS worker nodes across different Availability Zones simultaneously. The EFS CSI driver enables Kubernetes pods to mount EFS as a persistent volume, delivering the required high availability and durability for stateful workloads like databases without single-AZ dependency.
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 Amazon EBS volumes with the EBS CSI driver.
Why it's wrong here
EBS volumes are AZ-specific and cannot be shared across AZs.
✗
Use Amazon FSx for Lustre as a shared file system.
Why it's wrong here
FSx for Lustre is optimized for HPC workloads, not general-purpose persistent storage.
✓
Use Amazon EFS with the EFS CSI driver.
Why this is correct
EFS is a regional, highly available file system that can be mounted by containers across AZs.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Amazon S3 with the S3 CSI driver.
Why it's wrong here
S3 is object storage and not a POSIX-compliant file system; not suitable for databases.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse EBS's single-AZ attachment with multi-AZ availability, or mistakenly think S3's CSI driver provides file-level access, when in fact EFS is the only AWS managed file system that natively supports multi-AZ access and the Kubernetes CSI standard for stateful workloads.
Detailed technical explanation
How to think about this question
Under the hood, the EFS CSI driver uses the NFSv4.1 protocol to mount EFS file systems into Kubernetes pods, leveraging EFS's regional replication to automatically replicate data across multiple AZs within a region. For stateful workloads like databases, EFS's consistency model (close-to-open) and throughput scaling (based on burst credits or provisioned throughput) must be carefully considered, as database engines often require strong consistency and low-latency writes that EFS may not guarantee under high concurrency.
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 for New Solutions — This question tests Design for New Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Amazon EFS with the EFS CSI driver. — Amazon EFS provides a fully managed, elastic NFS file system that is accessible from multiple Amazon EKS worker nodes across different Availability Zones simultaneously. The EFS CSI driver enables Kubernetes pods to mount EFS as a persistent volume, delivering the required high availability and durability for stateful workloads like databases without single-AZ dependency.
What should I do if I get this SAP-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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Question Discussion
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