CV0-004 Deployment Practice Question
A company is deploying a containerized application on AWS Fargate. The application requires a persistent, shared storage volume that can be accessed by multiple tasks simultaneously and must survive task restarts. The storage must be highly available and scalable. Which storage solution should the company use?
⚠ Common exam trap
The trap here is assuming that EBS volumes can be shared across multiple Fargate tasks, but EBS is block storage that supports only single-attach for Fargate, and multi-attach is limited to specific EC2 instances.
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 Elastic File System (EFS)
Amazon EFS is designed for shared, elastic file storage that can be mounted by multiple Fargate tasks concurrently. It provides the persistent, highly available, and scalable storage needed for the application, unlike EBS volumes which are not shared, ephemeral storage which is temporary, or S3 which is not a file system.
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 Elastic File System (EFS)
Why this is correct
Amazon EFS is a fully managed, scalable, elastic file system that can be mounted by multiple EC2 instances and Fargate tasks simultaneously. It provides shared storage that persists independently of task lifecycle, meeting the requirements for high availability and scalability in a multi-task Fargate deployment.
- ✗
Amazon Elastic Block Store (EBS) volumes
Why it's wrong here
EBS volumes are block storage that can only be attached to a single EC2 instance or Fargate task at a time (with some exceptions for multi-attach, but not for Fargate). They do not provide shared access across multiple tasks and are not suitable for this scenario requiring concurrent access.
- ✗
Amazon S3 bucket mounted as a file system
Why it's wrong here
Amazon S3 is object storage and is not natively mountable as a file system for Fargate tasks. While third-party tools exist, they are not officially supported and introduce complexity. S3 does not provide the low-latency, POSIX-compliant shared file system required for containerized applications.
- ✗
AWS Fargate ephemeral storage
Why it's wrong here
Fargate tasks have ephemeral storage that is temporary and tied to the task lifecycle. It is not persistent across task restarts and cannot be shared among multiple tasks. This option fails to meet the requirements for durable, shared storage.
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
Related to this question
About these practice questions
Courseiva writes every CV0-004 question from scratch — 834 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.