Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company is migrating a web application to Azure. The web tier will run on Azure App Service (PaaS) and the database tier will use Azure SQL Database (PaaS). The company's IT team wants to understand their patching responsibilities for the underlying operating system (OS) of each service. According to the shared responsibility model, which statement is correct?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
The customer is responsible for patching the operating system of both Azure App Service and Azure SQL Database.
This is incorrect. In PaaS, the cloud provider manages the operating system patching for both services. The customer is not responsible for OS-level patching.
B
Distractor review
Microsoft is responsible for patching the operating system of Azure App Service, and the customer is responsible for patching the operating system of Azure SQL Database.
This is incorrect. For Azure SQL Database, Microsoft also manages the operating system patching. The customer does not have access to the OS and is not responsible for its maintenance.
C
Distractor review
The customer is responsible for patching the operating system of Azure App Service, and Microsoft is responsible for patching the operating system of Azure SQL Database.
This is incorrect. For Azure App Service (PaaS), Microsoft manages the OS patching. The customer only manages the application code and configuration.
D
Best answer
Microsoft is responsible for patching the operating system of both Azure App Service and Azure SQL Database.
This is correct. Both Azure App Service and Azure SQL Database are Platform as a Service (PaaS) offerings. In PaaS, Microsoft handles the underlying infrastructure, including OS patching, security updates, and hardware maintenance. The customer focuses on managing their application and data.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A developer is building a serverless application that requires integration with an on-premises SQL Server database for real-time data processing. The on-premises network is connected to Azure via a site-to-site VPN. Which Azure service would allow the function to securely access the on-premises database without exposing it to the public internet?
Question 2
A solutions architect is designing a storage solution for a large media company. The company needs to store video files that are accessed infrequently but must be retained for several years for compliance. Which two Azure storage options meet these requirements? (Select two.)
Question 3
A company deploys a multi-tier application using Azure virtual machines. The web tier VMs must be evenly distributed across two distinct data centers within an Azure region to avoid a single point of failure from an infrastructure outage. Which Azure construct should they use to meet this requirement?
Question 4
A company wants to enforce a set of security policies across all their Azure subscriptions. They have created several individual policy definitions. Which Azure construct should they use to group these policies together and assign them as a single package?
Question 5
A company deploys a line-of-business application on an Azure virtual machine. The IT team wants to ensure the application remains secure. According to the shared responsibility model, which of the following security tasks is the sole responsibility of the customer (the company)?
Question 6
A company develops a web API that runs on Azure App Service. The development team wants to deploy a new version of the API to a staging environment, run integration tests against it, and then gradually shift production traffic to the new version. If any issues are detected, they want to immediately roll back to the previous version without redeploying. Which Azure App Service feature should the team use to meet these requirements?
FAQ
Questions learners often ask
What does this AZ-900 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Microsoft is responsible for patching the operating system of both Azure App Service and Azure SQL Database. — In the shared responsibility model for Platform as a Service (PaaS), the cloud provider (Microsoft) is responsible for managing the underlying infrastructure, including the operating system. For Azure App Service, Microsoft manages the OS and runtime environment. For Azure SQL Database, Microsoft manages the OS, database engine, and underlying hardware. The customer is responsible for their data, user access, and application-level configurations, but not for OS patching. This contrasts with Infrastructure as a Service (IaaS), where the customer manages the OS and middleware.
What should I do if I get this AZ-900 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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