PAS-C01 Technology Practice Question
A company is migrating an SAP NetWeaver system to AWS. The system uses a shared file system for central transport directories and logs. Which AWS storage service should be used to provide a scalable, highly available, and shared file system that can be mounted by multiple EC2 instances across different Availability Zones?
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 (Option B) is correct because it provides a scalable, highly available, shared NFS file system that can be mounted by multiple EC2 instances across different Availability Zones, making it suitable for SAP shared file systems. Option A (EBS with Multi-Attach) is incorrect because Multi-Attach only works within a single AZ and has limited attach instances (up to 16), not across AZs. Option C (EC2 Instance Store) is incorrect because it is ephemeral and cannot be shared across instances. Option D (Amazon S3 with S3 File Gateway) is incorrect because it is not a native shared file system; File Gateway provides NFS/SMB access to S3 but adds complexity and latency, and is not the recommended service for SAP shared directories.
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 EBS with Multi-Attach enabled
Why it's wrong here
Amazon EBS with Multi-Attach allows attachment to multiple instances but only within the same Availability Zone, not across AZs, and has limitations on the number of instances.
- ✓
Amazon EFS
Why this is correct
Amazon EFS provides a fully managed, highly available, and scalable NFS file system that can be accessed from multiple EC2 instances across different AZs, ideal for SAP shared directories.
- ✗
EC2 Instance Store
Why it's wrong here
EC2 Instance Store is ephemeral storage that is physically attached to the host, cannot be shared across instances, and data is lost on instance stop/termination.
- ✗
Amazon S3 with S3 File Gateway
Why it's wrong here
Amazon S3 with S3 File Gateway provides file access to S3, but it is not a native POSIX file system and adds latency; not suitable for SAP transport directories requiring low-latency shared file access.
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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JA
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.