Mock Exam Section 1: Cloud Concepts
Answer timed questions covering cloud benefits, service models, deployment models, shared responsibility, and CapEx versus OpEx — all weighted per the AZ-900 blueprint.
Mock Exam Section 1: Cloud Concepts is a free Cloud & IT Cert Prep lesson on CoddyKit — lesson 1 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Cloud & IT Cert Prep learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Mock Exam: Section 1 Introduction
Welcome to Mock Exam Section 1: Cloud Concepts. This section mirrors the first domain of the AZ-900 exam, weighted at approximately 25–30% of total marks. You will practice questions on cloud benefits, service models, deployment models, shared responsibility, and CapEx vs. OpEx. Treat this as a timed exercise — give yourself 12–15 minutes for this section. Read each scenario carefully before selecting an answer, and use the explanation scenes to reinforce your understanding.
Q1: Cloud Benefits Scenario
Scenario: A retail company's website normally handles 1,000 concurrent users. During the holiday season, traffic spikes to 50,000 concurrent users for six weeks. The company wants to pay for the additional capacity only during those six weeks and have it provided automatically without manual intervention. Which cloud benefit best describes this capability?
A) Elasticity — B) High Availability — C) Agility — D) Geo-Distribution
Q1: Answer — Elasticity
Answer: A — Elasticity. Elasticity is the ability to automatically scale resources up or down in response to demand, paying only for the capacity in use. Scalability is the ability to scale but does not imply automatic adjustment. High Availability is about uptime, not cost-based capacity adjustment. Agility refers to deploying resources quickly. The key differentiator for Elasticity: automatic adjustment + pay-as-you-go. Exam tip: if the scenario says 'automatically adjusts to demand', the answer is Elasticity.
Q2: Shared Responsibility
Scenario: A company deploys a web application on Azure App Service (PaaS). Their security team asks: Who is responsible for patching the operating system that runs the web application?
A) Microsoft (Azure) — B) The customer — C) Both Microsoft and the customer equally — D) Neither; OS patching is not required on PaaS
Q2: Answer — Microsoft Manages OS in PaaS
Answer: A — Microsoft (Azure). In the PaaS model, Microsoft manages the underlying infrastructure, operating system, and runtime. The customer is responsible for application code, data, and identity/access management. If this were an IaaS VM, the customer would be responsible for OS patching. Core rule: PaaS = Microsoft manages OS; IaaS = customer manages OS. This is the most frequently tested shared responsibility concept in AZ-900.
Q3: Service Model — No Server Management
Scenario: A developer wants to run a Python script that processes files from Azure Blob Storage. The script runs for 2 minutes once per hour. The developer does not want to manage any servers, and prefers to pay only when the script runs. Which Azure service best fits?
A) Azure Functions (Consumption Plan) — B) Azure App Service — C) Azure VM — D) Azure Container Instances
Q3: Answer — Azure Functions Serverless
Answer: A — Azure Functions (Consumption Plan). Azure Functions is serverless PaaS where you deploy code without managing infrastructure. The Consumption Plan scales to zero between executions and charges only for execution time. App Service requires a minimum running instance. Azure VMs (IaaS) require OS management. Container Instances could work but costs more per execution for scheduled workloads. Key signal: 'no servers, pay per execution' → Azure Functions Consumption Plan.
Q4: Cloud Deployment Models
Scenario: A government agency processes classified data that must never leave their own data centre. However, they also want to use Azure AI services for non-classified analytics. Which cloud deployment model fits their needs?
A) Hybrid Cloud — B) Public Cloud — C) Private Cloud — D) Community Cloud
Q4: Answer — Hybrid Cloud
Answer: A — Hybrid Cloud. Hybrid cloud connects on-premises (private) infrastructure with public cloud services (Azure), allowing workloads to run in the most appropriate environment. The classified data stays on-premises; non-classified analytics runs in Azure. A pure public cloud violates the data residency requirement. A pure private cloud cannot access Azure AI services. Key signal: on-premises + Azure simultaneously → Hybrid cloud. This is the most common deployment model question in AZ-900.
Q5: CapEx vs. OpEx
Scenario: A company is migrating from on-premises servers to Azure. The CFO states: 'I want to move our IT spending from large upfront capital investments to predictable monthly operational costs.' The CFO wants to move from ___ to ___?
A) CapEx to OpEx — B) OpEx to CapEx — C) CapEx to CapEx — D) This is not possible in cloud computing
Q5: Answer — CapEx to OpEx
Answer: A — CapEx to OpEx. Capital Expenditure (CapEx) covers upfront investment in physical hardware, depreciated over years. Operational Expenditure (OpEx) covers recurring costs like monthly Azure subscriptions paid from the operating budget. Cloud computing enables OpEx by charging for consumed resources monthly with no large upfront hardware cost. The CFO's goal — 'predictable monthly costs without upfront hardware spend' — is the textbook definition of the CapEx-to-OpEx shift.
Quick Check
Test your understanding of Microsoft Azure Fundamentals (AZ-900) concepts from this lesson.
Section 1 Recap
In this mock exam section you practiced: Elasticity (automatic demand-based scaling + pay-as-you-go), shared responsibility in PaaS (Microsoft manages OS), Azure Functions for serverless no-server-management workloads, Hybrid Cloud for on-premises + Azure simultaneous use, and the CapEx → OpEx shift that cloud enables. Review any question you answered incorrectly by revisiting its lesson. Next up: Section 2 tests Azure Architecture and Services knowledge.
Frequently asked questions
Is the “Mock Exam Section 1: Cloud Concepts” lesson free?
Yes — the full text of “Mock Exam Section 1: Cloud Concepts” is free to read here on the web, and the Cloud & IT Cert Prep course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Cloud & IT Cert Prep course, upgrade to CoddyKit PRO.
What will I learn in “Mock Exam Section 1: Cloud Concepts”?
Answer timed questions covering cloud benefits, service models, deployment models, shared responsibility, and CapEx versus OpEx — all weighted per the AZ-900 blueprint. You practise Cloud & IT Cert Prep with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Cloud & IT Cert Prep?
No prior experience is required. Cloud & IT Cert Prep on CoddyKit is structured for beginners through advanced learners; this is — lesson 1 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Mock Exam Section 1: Cloud Concepts” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Cloud & IT Cert Prep lesson?
Yes. Every Cloud & IT Cert Prep lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.