Cloud deployment models (public, private, hybrid) in Azure - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Identify the correct description of a public cloud

Which of the following best describes a public cloud deployment model?

A A cloud environment owned and operated by a single organization for its exclusive use.

B A cloud environment combining on-premises infrastructure with public cloud services.

C A cloud environment shared by multiple organizations, managed by a third-party provider.

D A cloud environment that is physically located only on the user's premises.

💡 Hint

Think about who manages the cloud and who can access it.

A public cloud is managed by a third-party provider and shared among multiple organizations, offering scalable resources over the internet.

❓ Architecture

intermediate

Choose the correct Azure service for a private cloud setup

Which Azure service is primarily used to create a private cloud environment within an organization's own data center?

A Azure Virtual Machines

B Azure Stack Hub

C Azure Blob Storage

D Azure App Service

💡 Hint

Look for the service that extends Azure to on-premises.

Azure Stack Hub allows organizations to run Azure services in their own data centers, creating a private cloud environment.

❓ service_behavior

advanced

Behavior of hybrid cloud during network outage

In a hybrid cloud setup using Azure Arc, what happens to workloads running on on-premises servers if the connection to the Azure public cloud is lost?

A Workloads continue running locally without interruption.

B All workloads immediately stop until the connection is restored.

C Workloads automatically migrate to Azure public cloud.

D Azure Arc disables all on-premises resources remotely.

💡 Hint

Consider how hybrid cloud supports local operations.

Hybrid cloud allows workloads to run locally on-premises even if the connection to the public cloud is lost, ensuring continuity.

❓ security

advanced

Security advantage of private cloud over public cloud

Which security advantage is unique to private cloud deployments compared to public clouds?

A Automatic software patching by the cloud provider.

B Unlimited scalability without hardware constraints.

C Shared security responsibility with multiple tenants.

D Exclusive physical access control to hardware by the organization.

💡 Hint

Think about physical control over infrastructure.

Private clouds allow organizations exclusive physical access to their hardware, enhancing security compared to shared public cloud environments.

✅ Best Practice

expert

Best practice for data residency in hybrid cloud

An organization must comply with strict data residency laws requiring sensitive data to remain within their country. Which hybrid cloud deployment practice best meets this requirement using Azure?

A Use Azure Stack Hub on-premises for sensitive data and Azure public cloud for less sensitive workloads.

B Store all sensitive data in Azure public cloud regions outside the country and use encryption.

C Migrate all workloads to Azure public cloud and rely on Microsoft's compliance certifications.

D Keep all data on local servers without any cloud integration.

💡 Hint

Consider combining on-premises and cloud to meet legal requirements.

Using Azure Stack Hub on-premises ensures sensitive data stays within the country, while less sensitive workloads can run in the public cloud, balancing compliance and cloud benefits.

Practice

1. Which cloud deployment model is shared among multiple organizations and accessible over the internet?

easy

A. Public cloud

B. Private cloud

C. Hybrid cloud

D. Community cloud

Solution

1. Step 1: Understand public cloud characteristics

   Public cloud resources are shared and accessible to many users over the internet.

2. Step 2: Compare with other models

   Private cloud is dedicated to one organization; hybrid mixes both. Community cloud is shared by a specific group, not open to all.

3. Final Answer:

   Public cloud -> Option A

4. Quick Check:

   Shared and open = Public cloud [OK]

Hint: Shared and open means public cloud [OK]

Common Mistakes:

• Confusing private cloud as shared
• Thinking hybrid is fully public
• Mixing community cloud with public cloud

2. Which of the following is the correct description of a private cloud?

easy

A. Cloud resources shared publicly over the internet

B. Cloud infrastructure dedicated to a single organization

C. Combination of public and private clouds

D. Cloud services managed by a third-party for multiple organizations

Solution

1. Step 1: Define private cloud

   Private cloud means cloud infrastructure is dedicated to one organization only.

2. Step 2: Eliminate other options

   Public cloud is shared publicly, hybrid is a mix, and third-party managed multi-org is community or public cloud.

3. Final Answer:

   Cloud infrastructure dedicated to a single organization -> Option B

4. Quick Check:

   Dedicated to one org = Private cloud [OK]

Hint: Dedicated to one organization means private cloud [OK]

Common Mistakes:

• Choosing public cloud for private cloud definition
• Confusing hybrid cloud with private cloud
• Thinking third-party management means private cloud

3. A company uses a cloud setup where sensitive data is stored on their own servers, but they use public cloud services for less critical workloads. What type of cloud deployment model is this?

medium

A. Public cloud

B. Private cloud

C. Hybrid cloud

D. Community cloud

Solution

1. Step 1: Analyze the setup

   Sensitive data on private servers means private cloud; less critical workloads on public cloud means public cloud.

2. Step 2: Identify the combined model

   Using both private and public clouds together is called hybrid cloud.

3. Final Answer:

   Hybrid cloud -> Option C

4. Quick Check:

   Mix of private and public = Hybrid cloud [OK]

Hint: Mix of private and public clouds is hybrid [OK]

Common Mistakes:

• Choosing private cloud only
• Confusing community cloud with hybrid
• Selecting public cloud ignoring private part

4. Identify the error in this cloud deployment description: "A hybrid cloud stores all data on public cloud servers but uses private cloud for running applications."

medium

A. Hybrid cloud cannot use public cloud servers

B. Private cloud cannot run applications

C. Hybrid cloud must use community cloud services

D. Data storage and application hosting roles are reversed

Solution

1. Step 1: Understand hybrid cloud roles

   Hybrid cloud mixes private and public clouds, typically sensitive data is kept private, apps can run anywhere.

2. Step 2: Spot the reversed roles

   The description says all data is on public cloud but apps run on private cloud, which is unusual and reversed from best practice.

3. Final Answer:

   Data storage and application hosting roles are reversed -> Option D

4. Quick Check:

   Data usually private, apps flexible = Roles reversed [OK]

Hint: Data usually private, apps flexible in hybrid [OK]

Common Mistakes:

• Thinking hybrid can't use public cloud
• Believing private cloud can't run apps
• Confusing community cloud with hybrid

5. A company wants to keep customer financial data highly secure on their own servers but also wants to quickly scale their website traffic using cloud resources. Which deployment model should they choose and why?

hard

A. Hybrid cloud, because it combines secure private storage with scalable public resources

B. Private cloud, because it allows unlimited scaling without sharing resources

C. Public cloud, because it offers the best security for financial data

D. Community cloud, because it shares resources with similar companies

Solution

1. Step 1: Identify security needs

   Financial data needs high security, best kept on private servers.

2. Step 2: Identify scaling needs

   Website traffic can be handled by scalable public cloud resources.

3. Step 3: Match deployment model

   Hybrid cloud combines private security with public scalability, fitting both needs.

4. Final Answer:

   Hybrid cloud, because it combines secure private storage with scalable public resources -> Option A

5. Quick Check:

   Secure + scalable = Hybrid cloud [OK]

Hint: Secure data + scale = hybrid cloud [OK]

Common Mistakes:

• Choosing public cloud for sensitive data
• Assuming private cloud scales unlimited
• Confusing community cloud with hybrid