Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company uses Azure to host a web application. At the end of each month, the finance team receives an invoice that details charges for compute hours, storage consumption, and outbound data transfer. The IT manager explains that this granular billing is possible because Azure continuously monitors resource usage and provides detailed usage data for cost allocation. This capability is a direct example of which essential characteristic of cloud computing as defined by the National Institute of Standards and Technology (NIST)?
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
On-demand self-service
On-demand self-service allows a consumer to provision computing capabilities automatically without requiring human interaction with the service provider. While Azure does offer self-service provisioning, the scenario focuses on post-usage metering and billing, not the initial provisioning process.
B
Distractor review
Broad network access
Broad network access means that resources are available over the network and can be accessed by standard client platforms (e.g., mobile phones, laptops). The scenario describes usage monitoring and billing, not network accessibility.
C
Distractor review
Resource pooling
Resource pooling enables the provider's computing resources to be pooled to serve multiple consumers using a multi-tenant model. The scenario emphasizes metering and billing, not the sharing of physical resources among tenants.
D
Best answer
Measured service
Measured service is the correct characteristic. Cloud systems automatically control and optimize resource use by leveraging a metering capability. This allows providers to track usage (compute hours, storage, bandwidth) and bill consumers accordingly, as described in the scenario.
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: Measured service — The NIST definition of cloud computing includes five essential characteristics: On-demand self-service, Broad network access, Resource pooling, Rapid elasticity, and Measured service. Measured service means that cloud systems automatically control and optimize resource use by leveraging a metering capability at some level of abstraction appropriate to the type of service (e.g., storage, processing, bandwidth). Resource usage can be monitored, controlled, and reported, providing transparency for both the provider and consumer. In this scenario, Azure's ability to track compute hours, storage, and data transfer and then generate a detailed invoice is a direct implementation of measured service.
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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