CV0-004 Cloud Architecture and Design Practice Question
A company is migrating its on-premises application to a public cloud. The application consists of a web server, an application server, and a database. They want to minimize management overhead while ensuring the application can scale automatically. Which THREE cloud service models should they consider for each component to achieve this goal? (Select THREE.)
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
✓
PaaS for database
For web server: PaaS (e.g., AWS Elastic Beanstalk) can manage the runtime and scaling. For application server: PaaS also works. For database: PaaS (e.g., Amazon RDS) provides managed database with auto-scaling. IaaS would require more management of OS and scaling. SaaS is complete application, not appropriate for custom components. FaaS could be used but is more granular.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
SaaS for database
Why it's wrong here
SaaS is not suitable for custom database control; it provides complete applications.
- ✓
PaaS for database
Why this is correct
Managed database services like RDS offer auto-scaling and reduced management.
- ✗
IaaS for web server
Why it's wrong here
IaaS requires managing OS and scaling manually, increasing management overhead.
- ✓
PaaS for application server
Why this is correct
PaaS reduces management overhead and supports auto-scaling.
- ✓
PaaS for web server
Why this is correct
PaaS manages runtime and scaling automatically.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
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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.