Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A healthcare organization migrates its patient data management application to Azure. The organization's compliance team learns that Azure's underlying physical infrastructure, including servers and storage, is shared by many customers globally. The team is concerned about data leakage and wants to understand which fundamental cloud computing characteristic allows the provider to share physical hardware among multiple tenants while ensuring that each tenant's data and compute resources remain logically isolated and secure from one another.
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
Rapid elasticity
Rapid elasticity refers to the ability to quickly scale resources up or down based on demand. While important for handling variable workloads, it does not directly address the sharing of physical infrastructure with logical isolation among tenants.
B
Best answer
Resource pooling
Resource pooling is the correct characteristic. It means the cloud provider's computing resources are pooled to serve multiple customers using a multi-tenant model, with strict logical isolation so that each tenant's data and processes are secure and private, even though they share the same physical hardware.
C
Distractor review
Measured service
Measured service refers to the metering and billing of cloud resources based on usage (e.g., pay-as-you-go). It does not explain how multiple tenants can securely share the same physical infrastructure.
D
Distractor review
Broad network access
Broad network access describes the ability to access cloud resources over the internet from a variety of devices (e.g., smartphones, laptops). It does not pertain to multi-tenancy or logical isolation of shared physical resources.
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: Resource pooling — The scenario describes a core aspect of cloud computing where the provider pools its resources to serve multiple customers. This characteristic is known as 'resource pooling' (one of the five essential characteristics defined by NIST). It allows the cloud provider to dynamically assign and reassign physical and virtual resources among tenants, maintaining strict isolation through hypervisor-level separation, virtual networks, and encryption. The other options describe different essential characteristics: rapid elasticity (scaling), measured service (metering and billing), and broad network access (network accessibility).
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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