Azure AZ-900

Which cloud computing characteristic ensures that resources can be increased or decreased quickly to match demand?

• AHigh availability
• BElasticity
• CFault tolerance
• DDisaster recovery

A company is evaluating cloud models. They want full control over their infrastructure but also want the flexibility to burst workloads to a public cloud during peak periods. Which cloud model best fits this requirement?

• APublic cloud
• BPrivate cloud
• CHybrid cloud
• DCommunity cloud

Under the shared responsibility model in Azure, which of the following is ALWAYS the customer's responsibility, regardless of the cloud service model used?

• APhysical datacenter security
• BNetwork infrastructure maintenance
• COperating system patching
• DData and identity management

A startup wants to deploy a web application without managing servers, operating systems, or runtime environments. They pay only for the execution time of their code. Which compute approach matches this requirement?

• AAzure Virtual Machines (IaaS)
• BA Kubernetes cluster that the team manages
• CA ready-made SaaS application
• DServerless computing, such as Azure Functions

Which cloud service model gives customers the MOST control over the underlying infrastructure, including the operating system?

• AInfrastructure as a Service (IaaS)
• BPlatform as a Service (PaaS)
• CSoftware as a Service (SaaS)
• DDatabase as a Service (DBaaS)

A company is replacing its capital expenditure (CapEx) model for IT infrastructure with a cloud-based approach. Which Azure pricing concept aligns with this transition?

• AReserved capacity pricing
• BConsumption-based (operational expenditure) pricing
• CFixed monthly pricing
• DPerpetual licensing

An organization requires that their application remain available even if an entire Azure region experiences a complete outage. Which cloud benefit directly addresses this requirement?

• AScalability
• BAgility
• CGeo-redundancy / disaster recovery
• DElasticity

Which statement BEST describes the difference between vertical scaling and horizontal scaling in cloud computing?

• AVertical scaling adds more instances; horizontal scaling increases instance size
• BVertical scaling increases the power of a single instance (more CPU/RAM); horizontal scal…
• CVertical scaling is used for compute; horizontal scaling is used for storage
• DThey are identical concepts with different names

A company uses Microsoft 365, which is hosted entirely by Microsoft. Users access the service via a web browser and do not manage servers, storage, or application updates. Which service model does this represent?

• AInfrastructure as a Service (IaaS)
• BPlatform as a Service (PaaS)
• CSoftware as a Service (SaaS)
• DFunction as a Service (FaaS)

In the shared responsibility model, which party is responsible for the physical security of Azure datacenters?

• AThe customer
• BMicrosoft
• CBoth Microsoft and the customer equally
• DA third-party security firm contracted by the customer

Which cloud model involves infrastructure owned and managed by a single organization, located either on-premises or in a dedicated hosted environment?

• AProvider-operated public cloud
• BPrivate cloud
• CHybrid cloud
• DMulti-cloud

A healthcare organization must ensure that patient data is processed and stored only within the European Union due to GDPR requirements. Which cloud benefit helps address this regulatory need?

• AElasticity
• BAgility
• CGeo-distributed regions with data residency controls
• DHigh availability zones

Which of the following BEST describes the cloud computing "consumption-based model"?

• AYou pay a fixed monthly fee regardless of usage
• BYou purchase hardware upfront and depreciate it over time
• CYou pay only for the cloud resources you actually use
• DYou pre-purchase annual capacity at a discounted rate