PAS-C01 Technology Practice Question
A company is deploying SAP NetWeaver on AWS and wants to ensure high availability for the SAP Central Services (ASCS) and Enqueue Replication Server (ERS). They plan to use a cluster manager (Pacemaker) with a shared filesystem. The cluster will span two Availability Zones. The storage for the shared filesystem must be highly available and provide consistent performance. What storage solution should be used?
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
✓
Use Amazon EFS for the shared filesystem.
Amazon EFS provides a fully managed NFS filesystem that can be mounted from multiple EC2 instances across different Availability Zones, offering high availability and consistent performance for SAP Central Services (ASCS) and Enqueue Replication Server (ERS) shared filesystem. Option A is incorrect because Amazon S3 is object storage, not a POSIX-compliant filesystem, and cannot be used as a shared filesystem for SAP. Option B is incorrect because instance store volumes are ephemeral and local to each instance; they cannot be shared between nodes. Option C is incorrect because EBS Multi-Attach only supports attachment to multiple instances within the same Availability Zone, not across AZs, and has additional limitations for shared filesystem use.
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 an Amazon S3 bucket as the shared filesystem.
Why it's wrong here
Wrong because Amazon S3 is object storage, not a block or file storage suitable for a shared filesystem with consistent performance.
- ✗
Use instance store volumes (Local SSDs) on each node.
Why it's wrong here
Wrong because instance store volumes are ephemeral and cannot be shared between multiple instances across AZs.
- ✗
Use an Amazon EBS volume with Multi-Attach enabled.
Why it's wrong here
Wrong because EBS Multi-Attach is limited to a single Availability Zone and cannot span AZs.
- ✓
Use Amazon EFS for the shared filesystem.
Why this is correct
Correct because Amazon EFS provides a fully managed NFS filesystem that can be accessed from multiple EC2 instances across AZs, ensuring high availability and consistent performance for SAP shared files.
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 |
Go deeper
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PAS-C01 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 PAS-C01 exam.