CV0-004 Cloud Architecture and Design Practice Question
A cloud architect is selecting a storage solution for a database that requires low-latency reads and writes. The database will run on a single VM and must support consistent performance. Which storage type is most appropriate?
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
✓
Block storage
Block storage (e.g., EBS, Azure Disk) provides low-latency, consistent performance suitable for databases running on a single VM.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Archive storage
Why it's wrong here
Archive storage is designed for long-term retention with retrieval latency measured in hours, so it cannot deliver the low-latency reads and writes a database demands. It is tempting because it offers cheap durable capacity, and would be correct for infrequently accessed backups or compliance archives rather than an active database.
- ✗
Object storage
Why it's wrong here
Object storage uses HTTP-based access with high per-operation latency and no in-place block updates, so it cannot provide the low-latency reads and writes a database requires. It is tempting because it scales cheaply and durably, and would be correct for static content, backups or unstructured data rather than a transactional database.
- ✗
File storage
Why it's wrong here
File storage presents a shared network file system whose protocol overhead and shared access add latency and jitter, failing the consistent low-latency requirement for a single-VM database. It is tempting because it is simple and shareable, and would be correct for shared documents or lift-and-shift workloads needing concurrent file access.
- ✓
Block storage
Why this is correct
Block storage presents a raw volume directly to the VM, giving the database low-latency, consistent read/write performance on a single host. File and object storage add network protocol overhead and are unsuitable for database workloads needing predictable IOPS, so block satisfies the single-VM, consistent-performance constraint.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.