CV0-004 Cloud Architecture and Design Practice Question
A cloud architect is designing a system that requires a durable, highly available object storage solution for storing backups and media files. The data must be accessible from anywhere via HTTP/HTTPS. Which AWS service should be used?
⚠ Common exam trap
Many exam-takers confuse block or file storage with object storage, as EBS and EFS are often used for similar workloads but lack HTTP accessibility.
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 S3
Amazon S3 is the correct choice because it is a durable, highly available object storage service that supports HTTP/HTTPS access and is designed for backups and media files. EBS, EFS, and RDS serve different storage needs: block, file, and database respectively, and do not meet the object storage and accessibility requirements.
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 it's wrong here
Amazon EFS is a file storage service for Linux-based workloads, providing a shared file system. It is not object storage and is not accessible via HTTP/HTTPS. It is designed for EC2 instances and on-premises servers via Direct Connect, not for global HTTP access.
- ✗
Amazon RDS
Why it's wrong here
Amazon RDS is a managed relational database service, not an object storage solution. It is used for structured data and does not provide HTTP/HTTPS access for storing backups and media files. It is not suitable for this use case.
- ✗
Amazon EBS
Why it's wrong here
Amazon EBS provides block storage volumes for use with EC2 instances. It is not directly accessible via HTTP/HTTPS and is designed for attach to a single instance, not for shared object storage. It lacks the global accessibility and object storage characteristics needed.
- ✓
Amazon S3
Why this is correct
Amazon S3 is a durable, highly available object storage service designed for storing and retrieving any amount of data. It provides HTTP/HTTPS access and is ideal for backups and media files. S3 offers 99.999999999% durability and can be accessed globally, meeting the 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 |
Go deeper
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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
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