AZ-900 · Microsoft · Cloud Concepts · Bank updated 2026-11-03
AZ-900 practice questions: Cloud Concepts
5 free questions from 29 on this area · answer and explanation for each · no sign-up
These 5 questions come from the Cloud Concepts section of our AZ-900 bank (29 questions on this area, which carries 28% of the real exam). Every question is original, with the correct answer explained and linked to the source it is drawn from.
Free: 6 questions in study mode, no card. All 29 Cloud Concepts questions and the full AZ-900 bank: $15 one-time.
1/5 · Cloud Concepts · easy
A reporting job on a single virtual machine runs out of memory every night, although the number of concurrent users never changes. The team raises the machine's RAM and vCPU count. Which kind of scaling did they apply, and what would the other kind have looked like?
AVertical scaling; the alternative would be adding more instances
BHorizontal scaling; the alternative would be moving to another region
CVertical scaling; the alternative would be a larger disk tier
DHorizontal scaling; the alternative would be raising the instance's capabilities
Answer: A. Bullet 'Describe the benefits of high availability and scalability in the cloud'. The Learn unit states that scaling comes in two varieties: vertical scaling is focused on increasing or decreasing the capabilities of resources - for example adding more CPUs or RAM to a virtual machine - while horizontal scaling is adding or subtracting the number of resources, such as additional virtual machines or containers.
Source: Microsoft Learn - AZ-900 study guide: Describe cloud concepts
2/5 · Cloud Concepts
A finance officer asks what the cost predictability that Learn attributes to the cloud actually consists of. Which answer does Learn support?
AA fixed monthly charge agreed in advance for the workloads deployed.
BTracking resource use as it happens and forecasting future spend from it.
CA cap that stops charges once the forecast figure has been reached.
DAn invoice whose total is identical in each of the billing periods.
Answer: B. Bullet 'Describe the benefits of reliability and predictability in the cloud'. The Learn unit of that name splits predictability into performance and cost. Under 'Cost' it states that cost predictability is focused on predicting or forecasting the cost of the cloud spend, that with the cloud you can track your resource use in real time, monitor resources to ensure that you're using them in the most efficient way, and apply data analytics to find patterns and trends, and that by operating in the cloud you can predict future costs and adjust your resources as needed, with tools such as the Azure Pricing Calculator giving an estimate of potential spend.
Source: Microsoft Learn - AZ-900 study guide: Describe cloud concepts
3/5 · Cloud Concepts · hard
A hosting company built a datacenter, owns the servers in it and employs the engineers who run it. Its entire capacity is contracted to one insurer for five years. Which cloud model does Learn's account place that arrangement in?
APublic cloud
BHybrid cloud
CMulticloud
DPrivate cloud
Answer: D. Bullet 'Identify appropriate use cases for each cloud model'. The Learn unit 'Define cloud models' states that a private cloud is a cloud environment used by a single entity, that it evolved from the traditional datacenter model while keeping resources dedicated to one organization, and that a private cloud may be hosted from your on-site datacenter, or in a dedicated datacenter offsite, potentially even by a third party. The same unit requires two inter-connected environments for a hybrid cloud and two or more public providers for a multicloud scenario, neither of which this facility is.
Source: Microsoft Learn - AZ-900 study guide: Describe cloud concepts
4/5 · Cloud Concepts · hard
A finance team runs one database engine on a virtual machine it built and administers itself, and a second on the provider's managed database offering. The same customer records sit in both. How does Learn's account of the shared responsibility model split that pair?
APatching is the team's on the machine and on the managed offering; the records are the team's in both.
BPatching is the provider's on the machine and on the managed offering; the records are the provider's on both.
CPatching is the provider's on the managed offering and so are the records; both are the team's on the machine.
DPatching is the team's on the machine and the provider's on the managed offering; the records are the team's in both.
Answer: D. Bullet 'Describe the shared responsibility model'. The Learn unit states that for some things the responsibility depends on the situation: 'If you're using a cloud SQL database, the cloud provider would be responsible for maintaining the actual database. However, you're still responsible for the data that gets ingested into the database. If you deployed a virtual machine and installed an SQL database on it, you'd be responsible for database patches and updates, as well as maintaining the data and information stored in the database.' The same unit lists the information and data stored in the cloud among the things you are always responsible for.
Source: Microsoft Learn - AZ-900 study guide: Describe cloud concepts
5/5 · Cloud Concepts
A resource inside a cloud deployment fails its health check at three in the morning. What does Learn's account of management of the cloud say happens next?
AThe failing resource is replaced with no one acting.
BAn alert is raised and the team replaces the resource.
CThe workload is moved to the paired region by the platform.
DThe resource is restarted once and then left as it is.
Answer: A. Bullet 'Describe the benefits of manageability in the cloud'. The Learn unit splits manageability in two. Under management of the cloud it lists: automatically scale resource deployment based on need; deploy resources based on a preconfigured template, removing the need for manual configuration; monitor the health of resources and automatically replace failing resources; and receive automatic alerts based on configured metrics. Management in the cloud covers the portal, the command line interface, APIs and PowerShell.
Source: Microsoft Learn - AZ-900 study guide: Describe cloud concepts
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