CLF-C02 Cloud Concepts Practice Question
A development team is building a web application and wants to minimize operational overhead. The team wants to focus solely on writing and deploying code without managing the underlying operating system, runtime, or middleware. The team needs the ability to simply upload their application code and have it run, with the cloud provider automatically handling capacity provisioning, load balancing, and patching of the platform. Which cloud computing service model best describes this approach?
⚠ Common exam trap
Watch out — candidates often confuse PaaS with FaaS, mistakenly thinking that serverless functions (FaaS) inherently include full web application hosting with load balancing and capacity provisioning, whereas FaaS is event-driven and typically requires additional services (e.g., API Gateway, auto-scaling configuration) to achieve the same level of abstraction as PaaS.
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
✓
Platform as a Service (PaaS)
Platform as a Service (PaaS) is the correct model because it abstracts the underlying infrastructure, runtime, and middleware, allowing the team to simply upload code and have it executed. The cloud provider automatically handles capacity provisioning, load balancing, and patching, which directly matches the requirement to minimize operational overhead by focusing solely on code.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Infrastructure as a Service (IaaS)
Why it's wrong here
IaaS provides virtualized computing resources (e.g., virtual machines, storage) but requires the team to manage the operating system and runtime stack. This does not meet the goal of minimizing operational overhead for the platform layer.
When this WOULD be correct
A scenario where the team needs full control over the operating system, runtime, and middleware, such as installing custom software or configuring network settings, and is willing to manage patching and scaling. For example, migrating an existing on-premises application to the cloud with minimal changes.
- ✓
Platform as a Service (PaaS)
Why this is correct
PaaS (e.g., AWS Elastic Beanstalk) supplies a managed runtime on top of the underlying infrastructure: the provider handles operating system patches, middleware configuration, and capacity scaling. The development team only uploads the application code and the platform runs it, reducing administrative overhead while still allowing full control over the application logic. This matches the team's goal of minimizing operational burden while building a custom web application.
- ✗
Software as a Service (SaaS)
Why it's wrong here
SaaS (e.g., Salesforce, Microsoft 365) delivers a completed, ready-to-use application accessed over the internet, with the vendor managing everything from infrastructure to application maintenance. The team would not write or deploy custom code; they would merely configure and use the existing software. Because the scenario explicitly involves building a web application with custom logic, SaaS fails because it provides no development or deployment surface for that code.
When this WOULD be correct
A company wants to use a customer relationship management (CRM) system without building or maintaining any software, simply subscribing to a service like Salesforce. The question specifies that no custom code development is required.
- ✗
Function as a Service (FaaS)
Why it's wrong here
FaaS is a subset of PaaS where developers upload individual functions that are event-driven. While it reduces overhead, it is typically used for short-lived, stateless functions, not for a full web application. The scenario describes a broader application, making PaaS a more accurate fit.
When this WOULD be correct
A question where the team needs to run individual pieces of code in response to events (e.g., file uploads, API calls) without managing servers, and the code is short-lived and stateless. For example: 'A team wants to process images automatically when uploaded to a storage bucket, with no server management.'
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The CLF-C02 exam frequently reuses these exact scenarios with slightly different constraints.
✓Platform as a Service (PaaS)Correct answer▾
Why this is correct
PaaS (e.g., AWS Elastic Beanstalk) supplies a managed runtime on top of the underlying infrastructure: the provider handles operating system patches, middleware configuration, and capacity scaling. The development team only uploads the application code and the platform runs it, reducing administrative overhead while still allowing full control over the application logic. This matches the team's goal of minimizing operational burden while building a custom web application.
✗Infrastructure as a Service (IaaS)Wrong answer — click to see why▾
Why this is wrong here
IaaS provides virtualized computing resources like servers and storage, but the user must manage the operating system, runtime, and middleware. The question specifies the team wants to avoid managing these components, so IaaS does not meet the requirement.
★ When this WOULD be the correct answer
A scenario where the team needs full control over the operating system, runtime, and middleware, such as installing custom software or configuring network settings, and is willing to manage patching and scaling. For example, migrating an existing on-premises application to the cloud with minimal changes.
Why candidates choose this
Candidates may confuse IaaS with PaaS because both involve cloud-hosted infrastructure, but IaaS requires more operational overhead. They might think 'uploading code' implies IaaS, missing that PaaS abstracts the underlying platform.
✗Software as a Service (SaaS)Wrong answer — click to see why▾
Why this is wrong here
SaaS provides ready-to-use software applications accessed over the internet, not a platform for deploying custom code. The team needs to write and deploy their own application code, which SaaS does not support.
★ When this WOULD be the correct answer
A company wants to use a customer relationship management (CRM) system without building or maintaining any software, simply subscribing to a service like Salesforce. The question specifies that no custom code development is required.
Why candidates choose this
Candidates may confuse 'operational overhead' with 'no management at all,' thinking SaaS eliminates all responsibility, but they overlook the need to deploy custom application code.
✗Function as a Service (FaaS)Wrong answer — click to see why▾
Why this is wrong here
FaaS (Function as a Service) requires code to be deployed as individual functions triggered by events, not as a full web application. The question specifies uploading application code and having it run with automatic capacity provisioning and load balancing, which aligns with PaaS, not the event-driven, stateless function model of FaaS.
★ When this WOULD be the correct answer
A question where the team needs to run individual pieces of code in response to events (e.g., file uploads, API calls) without managing servers, and the code is short-lived and stateless. For example: 'A team wants to process images automatically when uploaded to a storage bucket, with no server management.'
Why candidates choose this
Candidates may confuse FaaS with PaaS because both abstract server management. However, FaaS is more granular (functions vs. applications) and event-driven, not suited for a full web app with persistent requests.
Analysis generated from the official CLF-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.