SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
A company is moving a legacy application that uses a shared file system to AWS. The application requires POSIX-compliant file storage that can be accessed by multiple EC2 instances simultaneously. Which AWS storage service should they use?
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) is correct because it provides a scalable, POSIX-compliant NFS file system that can be accessed by multiple EC2 instances simultaneously. Option A (Amazon FSx for Windows File Server) uses SMB protocol and is not POSIX-compliant. Option C (Amazon EBS with Multi-Attach) only supports a limited number of instances and has specific constraints, and it is not a fully managed shared file system. Option D (Amazon S3) is object storage and does not provide POSIX compliance.
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 FSx for Windows File Server
Why it's wrong here
Supports SMB protocol, not POSIX.
- ✓
Amazon EFS
Why this is correct
Provides a scalable, POSIX-compliant NFS file system.
- ✗
Amazon EBS with Multi-Attach
Why it's wrong here
Multi-Attach has limitations and is not fully POSIX.
- ✗
Amazon S3
Why it's wrong here
Object storage, not a file system with POSIX compliance.
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 SAP-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 SAP-C02 exam.