The answer is the compatibility of the application with managed database or middleware services, alongside the level of control over the operating system and runtime environment. This is correct because the core distinction between IaaS, PaaS, and SaaS lies in how much of the stack you manage: IaaS gives you full control over the OS and runtime, PaaS abstracts those layers but lets you deploy and configure applications, and SaaS hands you a finished product with no infrastructure control. On the CompTIA Cloud+ CV0-004 exam, this question tests your ability to map workload requirements to the right service model, often using a scenario where a legacy app needs a specific OS patch or a custom runtime that a PaaS platform cannot support. A common trap is assuming all cloud services offer the same flexibility, but the key is recognizing that PaaS locks you into its managed environment. Memory tip: think of IaaS as “I control the OS,” PaaS as “Platform abstracts the OS,” and SaaS as “Software only—no OS access.”
CV0-004 Operations and Support Practice Question
This CV0-004 practice question tests your understanding of operations and support. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A cloud administrator is planning a migration of on-premises workloads to the cloud. Which TWO factors should be considered when selecting the appropriate cloud service model (IaaS, PaaS, SaaS)?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The level of control required over the operating system and runtime environment.
Option B is correct because the level of control over the operating system and runtime environment is a defining factor when choosing between IaaS, PaaS, and SaaS. IaaS provides full control over the OS and runtime, PaaS abstracts the OS and runtime but allows control over application deployment, and SaaS offers no control over the underlying infrastructure. This directly impacts migration decisions, especially for legacy applications that require specific OS configurations or custom runtime dependencies.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The scalability requirements of the application.
Why it's wrong here
All cloud models offer scalability.
✓
The level of control required over the operating system and runtime environment.
Why this is correct
Determines if IaaS (full control) or PaaS (less control) is needed.
Related concept
Read the scenario before looking for a memorised answer.
✗
The security compliance requirements for data at rest.
Why it's wrong here
Security is important but not a deciding factor between service models.
✓
The compatibility of the application with managed database or middleware services.
Why this is correct
If app uses compatible services, PaaS/SaaS may be viable.
Related concept
Read the scenario before looking for a memorised answer.
✗
The total cost of ownership compared to on-premises.
Why it's wrong here
Cost is a consideration but not a primary factor for service model selection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that security compliance or scalability are primary factors for service model selection, when in fact they are operational requirements that apply across all models, while control over the OS and runtime is the key differentiator.
Detailed technical explanation
How to think about this question
Under the hood, the choice between IaaS, PaaS, and SaaS determines the boundary of responsibility in the shared responsibility model. For example, in IaaS, the customer manages the OS, runtime, and applications, while in PaaS, the provider manages the OS and runtime, but the customer manages the application code and data. A real-world scenario is migrating a .NET Framework application that requires a specific Windows Server version with custom IIS modules; this would necessitate IaaS, whereas a containerized application could leverage PaaS like Azure App Service or AWS Elastic Beanstalk.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Operations and Support — This question tests Operations and Support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The level of control required over the operating system and runtime environment. — Option B is correct because the level of control over the operating system and runtime environment is a defining factor when choosing between IaaS, PaaS, and SaaS. IaaS provides full control over the OS and runtime, PaaS abstracts the OS and runtime but allows control over application deployment, and SaaS offers no control over the underlying infrastructure. This directly impacts migration decisions, especially for legacy applications that require specific OS configurations or custom runtime dependencies.
What should I do if I get this CV0-004 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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