- A
Amazon EFS
EFS provides a shared NFS file system that can be accessed from multiple EC2 instances.
- B
Amazon EBS volumes with multi-attach
Why wrong: Multi-attach is limited to certain instance types and not ideal for shared transport.
- C
EC2 Instance Store
Why wrong: Instance Store is ephemeral and not shared.
- D
Amazon S3
Why wrong: S3 is object storage, not a POSIX file system.
Question 1,135 of 1,733
PAS-C01 Technology Practice Question
This PAS-C01 practice question tests your understanding of technology. 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 is deploying SAP NetWeaver on AWS and needs to ensure high availability for the ASCS instance. They plan to use a shared file system for the transport directory. Which AWS storage service is most appropriate for this shared file system?
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 EFS
Amazon EFS provides a fully managed, scalable, and highly available NFS file system that can be mounted concurrently by multiple EC2 instances across multiple Availability Zones. For SAP NetWeaver ASCS high availability, the transport directory (/usr/sap/trans) must be shared between the active and passive ASCS instances, and EFS supports the required NFSv4 protocol with strong consistency and POSIX permissions, making it the most appropriate choice.
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
Why this is correct
EFS provides a shared NFS file system that can be accessed from multiple EC2 instances.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon EBS volumes with multi-attach
Why it's wrong here
Multi-attach is limited to certain instance types and not ideal for shared transport.
- ✗
EC2 Instance Store
Why it's wrong here
Instance Store is ephemeral and not shared.
- ✗
Amazon S3
Why it's wrong here
S3 is object storage, not a POSIX file system.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'shared file system' with 'shared block storage' and choose EBS multi-attach, not realizing that EBS multi-attach is limited to a single AZ and lacks the cross-AZ high availability required for SAP ASCS failover.
Detailed technical explanation
How to think about this question
SAP NetWeaver ASCS instances require a shared transport directory accessible via NFS with strict file locking (e.g., using SAP's enqueue replication). Amazon EFS uses NFSv4.1 with strong consistency and supports AWS Global Accelerator for cross-region scenarios, but note that EFS performance modes (General Purpose vs. Max I/O) must be chosen carefully—General Purpose is recommended for SAP workloads due to lower latency and consistency needs. In real-world deployments, customers often use EFS with mount targets in each AZ and configure SAP's sapnwha script to mount the transport directory before starting ASCS services.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
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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: Amazon EFS — Amazon EFS provides a fully managed, scalable, and highly available NFS file system that can be mounted concurrently by multiple EC2 instances across multiple Availability Zones. For SAP NetWeaver ASCS high availability, the transport directory (/usr/sap/trans) must be shared between the active and passive ASCS instances, and EFS supports the required NFSv4 protocol with strong consistency and POSIX permissions, making it the most appropriate choice.
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.
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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