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Develop Azure compute solutions →easyMultiple ChoiceObjective-mapped

Quick Answer

The answer is to add 'webSocketsEnabled': true to the siteConfig property of the ARM template. This setting is required because Azure App Service disables WebSocket protocol support by default, and enabling it allows the application to maintain persistent, full-duplex TCP connections essential for real-time features like live chat or notifications. On the Microsoft Azure Developer Associate AZ-204 exam, this concept tests your understanding of ARM template configuration for App Service networking, often appearing in a multiple-choice scenario where you must identify the missing property among siteConfig options. A common trap is confusing this with the 'alwaysOn' setting, which keeps the app loaded but does not enable WebSocket traffic. Remember the memory tip: "WebSockets need a persistent door, so flip the switch to true in siteConfig."

AZ-204 Develop Azure compute solutions Practice Question

This AZ-204 practice question tests your understanding of develop azure compute solutions. 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.

Exhibit

Refer to the exhibit.

{
  "type": "Microsoft.Web/sites",
  "apiVersion": "2023-01-01",
  "name": "[parameters('webAppName')]",
  "kind": "app",
  "properties": {
    "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', parameters('hostingPlanName'))]",
    "siteConfig": {
      "alwaysOn": true,
      "http20Enabled": true,
      "minTlsVersion": "1.2",
      "ftpsState": "FtpsOnly"
    }
  }
}

You are reviewing an ARM template snippet for an Azure App Service. The exhibit shows the site configuration. You need to ensure that the app supports WebSocket connections for a real-time feature. Which setting must be added?

Question 1easymultiple choice
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Exhibit

Refer to the exhibit.

{
  "type": "Microsoft.Web/sites",
  "apiVersion": "2023-01-01",
  "name": "[parameters('webAppName')]",
  "kind": "app",
  "properties": {
    "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', parameters('hostingPlanName'))]",
    "siteConfig": {
      "alwaysOn": true,
      "http20Enabled": true,
      "minTlsVersion": "1.2",
      "ftpsState": "FtpsOnly"
    }
  }
}

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

✓

Add 'webSocketsEnabled': true to siteConfig.

Option D is correct because the 'webSocketsEnabled' property in the siteConfig of an Azure App Service ARM template explicitly enables WebSocket protocol support. WebSocket connections require a persistent, full-duplex communication channel over a single TCP connection, which is not enabled by default in Azure App Service. Setting this property to true allows the app to handle real-time features like chat or live notifications.

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.

  • ✗

    Set alwaysOn to false.

    Why it's wrong here

    alwaysOn does not affect WebSocket support.

  • ✗

    Set http20Enabled to false.

    Why it's wrong here

    HTTP/2 is independent of WebSockets.

  • ✗

    Change ftpsState to AllAllowed.

    Why it's wrong here

    FTPS state is for file transfer, not WebSockets.

  • ✓

    Add 'webSocketsEnabled': true to siteConfig.

    Why this is correct

    WebSockets must be explicitly enabled in App Service.

    Related concept

    Read the scenario before looking for a memorised answer.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse 'webSocketsEnabled' with other networking or protocol settings like HTTP/2 or alwaysOn, assuming WebSockets are automatically supported or require a different configuration flag.

Detailed technical explanation

How to think about this question

WebSocket connections in Azure App Service are proxied through the front-end load balancer, which requires the 'webSocketsEnabled' flag to be set to true in the site configuration. Under the hood, this flag enables the App Service platform to upgrade HTTP connections to WebSocket connections using the HTTP Upgrade header (RFC 6455). In a real-world scenario, if you deploy a SignalR or Socket.IO app without this setting, the WebSocket handshake will fail with a 400 or 426 error, forcing fallback to long-polling which degrades performance.

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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.

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 AZ-204 question test?

Develop Azure compute solutions — This question tests Develop Azure compute solutions — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Add 'webSocketsEnabled': true to siteConfig. — Option D is correct because the 'webSocketsEnabled' property in the siteConfig of an Azure App Service ARM template explicitly enables WebSocket protocol support. WebSocket connections require a persistent, full-duplex communication channel over a single TCP connection, which is not enabled by default in Azure App Service. Setting this property to true allows the app to handle real-time features like chat or live notifications.

What should I do if I get this AZ-204 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.

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Last reviewed: Jun 24, 2026

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