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Difficulty: MediumShared Responsibility Model

A logistics company runs its inventory API on Azure Virtual Machines. The company decides to migrate this workload to Azure App Service (PaaS) to reduce administrative overhead. Which statement correctly describes how the responsibility for the operating system and runtime shifts after this migration?

  1. A
    The customer remains responsible for installing operating system updates, while Microsoft assumes responsibility for application configuration.
  2. Microsoft becomes responsible for patching the operating system and runtime, while the customer remains responsible for configuring the application and data.Answer
  3. C
    Microsoft assumes responsibility for all layers, including application source code maintenance and user identity management.
  4. D
    The customer remains responsible for maintaining the physical server hardware and virtualization layer hosting the App Service.

Answer

Microsoft becomes responsible for patching the operating system and runtime, while the customer remains responsible for configuring the application and data.
In the Platform as a Service (PaaS) model, Microsoft takes over the management and patching of the underlying operating system and runtime environment (such as IIS, Node.js, or .NET runtimes). However, the customer is still responsible for deploying and configuring their application code, managing user identities, and protecting their data.

Step-by-Step Solution

1
Identify the source and target cloud service models in the scenario.
The workload is migrating from Azure Virtual Machines (IaaS) to Azure App Service (PaaS).
Understanding the service model transition is key to applying the Shared Responsibility Model.
2
Determine the distribution of responsibilities in a Platform as a Service (PaaS) model.
In PaaS, responsibility for physical infrastructure, operating systems, and network controls shifts to the cloud provider (Microsoft), while the customer retains responsibility for information/data, devices, accounts, and application settings.
This allows comparison of the options against the actual model rules.

Key Concept

Shared Responsibility Model
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Topics

Shared Responsibility Model

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