App Service plans and pricing tiers in Azure - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding App Service Plan Pricing Tiers

Which App Service plan pricing tier provides built-in autoscaling and supports deployment slots?

A Standard (S1)

B Shared (D1)

C Free (F1)

D Basic (B1)

💡 Hint

Consider which tiers support production workloads and advanced features.

The Standard tier supports autoscaling and deployment slots, which are not available in Free, Shared, or Basic tiers.

❓ Architecture

intermediate

Choosing the Right App Service Plan for High Traffic

You expect your web app to have unpredictable traffic spikes and need to minimize downtime. Which pricing tier should you select to handle this?

A Shared (D1)

B Basic (B2)

C Free (F1)

D Premium v2 (P1v2)

💡 Hint

Look for tiers that support autoscale and enhanced performance.

Premium v2 tier supports autoscaling, better hardware, and advanced networking features suitable for high traffic and minimizing downtime.

❓ service_behavior

advanced

Effect of Changing App Service Plan Pricing Tier

If you scale an App Service plan from Basic (B1) to Standard (S1), which of the following behaviors will occur?

A The app will be temporarily deleted and recreated.

B Deployment slots become available and autoscaling can be configured.

C The app will lose all existing SSL bindings.

D The app will automatically switch to a different region.

💡 Hint

Think about feature differences between Basic and Standard tiers.

Scaling up to Standard enables deployment slots and autoscaling without deleting the app or changing regions.

❓ security

advanced

Security Features in App Service Plan Pricing Tiers

Which App Service plan pricing tier first supports Virtual Network (VNet) integration for enhanced security?

A Basic (B1)

B Premium v2 (P1v2)

C Standard (S1)

D Free (F1)

💡 Hint

VNet integration is available starting from a tier that supports production workloads and networking features.

Standard tier is the first to support VNet integration, enabling secure network access.

✅ Best Practice

expert

Cost Optimization with App Service Plans

You have multiple low-traffic web apps. What is the best practice to reduce costs while maintaining isolation?

A Deploy all apps in a single Standard (S1) App Service plan with deployment slots.

B Deploy each app in its own Basic (B1) App Service plan.

C Deploy all apps in a single Free (F1) App Service plan.

D Deploy each app in its own Premium v2 (P1v2) App Service plan.

💡 Hint

Consider sharing resources to save cost but keep apps isolated logically.

Using a single Standard plan with deployment slots allows multiple apps to share resources efficiently while maintaining logical isolation.

Practice

1. What does an Azure App Service plan primarily define for your web app?

easy

A. The amount of computing resources like CPU and memory allocated

B. The programming language your app uses

C. The number of users who can access your app

D. The database type your app connects to

Solution

1. Step 1: Understand the role of an App Service plan

   An App Service plan defines the compute resources such as CPU, memory, and storage that your app will use.

2. Step 2: Differentiate from other app settings

   It does not control programming language, user count, or database type, which are separate configurations.

3. Final Answer:

   The amount of computing resources like CPU and memory allocated -> Option A

4. Quick Check:

   App Service plan = compute resources [OK]

Hint: App Service plan = resources your app runs on [OK]

Common Mistakes:

• Confusing App Service plan with app code or database
• Thinking it controls user access limits
• Assuming it sets programming language

2. Which of the following is the correct way to specify a Standard pricing tier in an Azure App Service plan using Azure CLI?

easy

A. az appservice plan create --name MyPlan --resource-group MyGroup --plan-tier Standard

B. az appservice plan create --name MyPlan --resource-group MyGroup --sku Standard

C. az appservice plan create --name MyPlan --resource-group MyGroup --pricing-tier Standard

D. az appservice plan create --name MyPlan --resource-group MyGroup --tier Standard

Solution

1. Step 1: Recall Azure CLI syntax for App Service plan creation

   The correct parameter to specify pricing tier is '--sku' followed by the tier name like 'Standard'.

2. Step 2: Verify other options

   Options using '--tier', '--pricing-tier', or '--plan-tier' are invalid parameters and will cause errors.

3. Final Answer:

   az appservice plan create --name MyPlan --resource-group MyGroup --sku Standard -> Option B

4. Quick Check:

   Use --sku to set pricing tier [OK]

Hint: Use --sku to set tier in Azure CLI [OK]

Common Mistakes:

• Using incorrect parameter names like --tier or --pricing-tier
• Confusing plan name with tier parameter
• Omitting the resource group

3. Given an App Service plan with pricing tier set to 'Basic', what will happen if you try to enable autoscaling for your app?

medium

A. Autoscaling is enabled by default on Basic tier

B. Autoscaling will work because Basic tier supports it

C. Autoscaling will work only during business hours

D. Autoscaling will fail because Basic tier does not support autoscale

Solution

1. Step 1: Understand autoscaling support by pricing tiers

   Autoscaling is supported starting from the Standard tier and above, not in Basic tier.

2. Step 2: Apply this to the Basic tier scenario

   Since Basic tier lacks autoscale support, attempts to enable it will fail or be blocked.

3. Final Answer:

   Autoscaling will fail because Basic tier does not support autoscale -> Option D

4. Quick Check:

   Basic tier = no autoscale support [OK]

Hint: Autoscale needs Standard or higher tier [OK]

Common Mistakes:

• Assuming Basic tier supports autoscale
• Thinking autoscale is automatic on all tiers
• Confusing Basic with Standard tier features

4. You created an App Service plan with the SKU 'F1' but your app is not accessible publicly. What is the most likely cause?

medium

A. You must assign a custom domain to make it public

B. F1 tier does not support public access by default

C. F1 is a Free tier and may have limited outbound network access

D. F1 tier requires manual SSL configuration before public access

Solution

1. Step 1: Understand the Free (F1) tier limitations

   The Free tier (F1) has restrictions including limited outbound network access and possible cold start delays.

2. Step 2: Relate these limits to app accessibility

   Limited network access can cause the app to be unreachable or slow, but public access is allowed.

3. Final Answer:

   F1 is a Free tier and may have limited outbound network access -> Option C

4. Quick Check:

   F1 tier = limited network, possible access issues [OK]

Hint: Free tier has network limits causing access issues [OK]

Common Mistakes:

• Thinking Free tier blocks public access
• Assuming custom domain is required for public access
• Believing SSL setup is mandatory for access

5. You need to host a production web app with high traffic, custom domains, SSL, autoscaling, and daily backups. Which App Service plan pricing tier should you choose?

hard

A. Standard (S1)

B. Basic (B1)

C. Free (F1)

D. Shared (D1)

Solution

1. Step 1: Identify required features for production app

   High traffic, custom domains, SSL, autoscaling, and backups require a tier with advanced features.

2. Step 2: Match features to pricing tiers

   Standard tier supports autoscaling, custom domains, SSL, and backups. Basic lacks autoscaling and some features. Free and Shared tiers are limited.

3. Final Answer:

   Standard (S1) -> Option A

4. Quick Check:

   Production needs Standard tier features [OK]

Hint: Standard tier supports autoscale and backups [OK]

Common Mistakes:

• Choosing Free or Shared for production needs
• Assuming Basic supports autoscale
• Ignoring backup requirements