- A
Software as a Service (SaaS)
Why wrong: SaaS provides complete applications managed by the provider — the customer uses the software but has no control over the underlying OS, storage, or infrastructure. A managed email service like WorkMail is SaaS.
- B
Platform as a Service (PaaS)
Why wrong: PaaS abstracts the OS and infrastructure so developers focus on application code. Elastic Beanstalk is PaaS — it manages OS, web server, and runtime automatically.
- C
Infrastructure as a Service (IaaS)
IaaS gives customers control over the OS, storage, and deployed applications while AWS manages the physical hardware and virtualisation. Running MySQL on an EC2 instance where the customer selects and patches the OS and controls the MySQL installation is classic IaaS.
- D
Function as a Service (FaaS)
Why wrong: FaaS (like AWS Lambda) abstracts everything below the function code — no OS, runtime, or server management. It is even more abstracted than PaaS.
CLF-C02 Cloud Concepts Practice Question
This CLF-C02 practice question tests your understanding of cloud concepts. 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 company wants to run a MySQL database on AWS. They require full control over the operating system, MySQL version selection, storage layout, and network configuration. Which cloud service model provides this level of control?
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
Infrastructure as a Service (IaaS)
C is correct because Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, giving the customer full control over the operating system, database software (including MySQL version selection), storage layout (e.g., instance store vs. EBS volumes), and network configuration (e.g., VPC, subnets, security groups). This is the only service model that allows you to manage the underlying OS and database stack directly, similar to running a physical server.
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.
- ✗
Software as a Service (SaaS)
Why it's wrong here
SaaS provides complete applications managed by the provider — the customer uses the software but has no control over the underlying OS, storage, or infrastructure. A managed email service like WorkMail is SaaS.
- ✗
Platform as a Service (PaaS)
Why it's wrong here
PaaS abstracts the OS and infrastructure so developers focus on application code. Elastic Beanstalk is PaaS — it manages OS, web server, and runtime automatically.
- ✓
Infrastructure as a Service (IaaS)
Why this is correct
IaaS gives customers control over the OS, storage, and deployed applications while AWS manages the physical hardware and virtualisation. Running MySQL on an EC2 instance where the customer selects and patches the OS and controls the MySQL installation is classic IaaS.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Function as a Service (FaaS)
Why it's wrong here
FaaS (like AWS Lambda) abstracts everything below the function code — no OS, runtime, or server management. It is even more abstracted than PaaS.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Amazon RDS (a PaaS offering) with full control, but RDS does not allow OS access, custom MySQL version selection outside supported versions, or direct storage layout control, making IaaS the only correct choice for the stated requirements.
Detailed technical explanation
How to think about this question
Under the hood, IaaS on AWS (e.g., Amazon EC2) uses hypervisor-based virtualization (Nitro or Xen) to present a full virtual machine with a guest OS. You can install MySQL from source or a custom AMI, configure LVM or RAID for storage layout, and manage network interfaces via VPC, route tables, and NACLs. A real-world scenario is a legacy application requiring MySQL 5.6 with a specific InnoDB configuration and direct-attached storage (instance store) for performance, which is impossible in RDS (PaaS) due to its managed abstraction.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Visual reference
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 |
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.
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Concepts — This question tests Cloud Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Infrastructure as a Service (IaaS) — C is correct because Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, giving the customer full control over the operating system, database software (including MySQL version selection), storage layout (e.g., instance store vs. EBS volumes), and network configuration (e.g., VPC, subnets, security groups). This is the only service model that allows you to manage the underlying OS and database stack directly, similar to running a physical server.
What should I do if I get this CLF-C02 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jun 11, 2026
This CLF-C02 practice question is part of Courseiva's free Amazon Web Services 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 CLF-C02 exam.
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