Microsoft Azure Fundamentals (AZ-900) — All Questions
6 questions
A company wants compute capacity to automatically increase during busy periods and decrease when demand falls, without manual intervention. Which cloud characteristic is this?
- a.High availability
- b.Elasticity✓
- c.Disaster recovery
- d.Data residency
Elasticity is the automatic adding and removing of resources to match demand in real time. High availability keeps services running despite failures, disaster recovery restores service after an outage, and data residency concerns where data is stored geographically.
Moving from buying on-premises servers to paying monthly for cloud resources based on usage represents which shift?
- a.From OpEx to CapEx
- b.From SaaS to IaaS
- c.From capital expenditure (CapEx) to operating expenditure (OpEx)✓
- d.From private to public data residency
Buying hardware upfront is a capital expenditure, while pay-as-you-go cloud consumption is an operating expenditure, so the move is CapEx to OpEx. The other options reverse the direction or describe unrelated concepts.
Under the shared responsibility model, which task is always the customer's responsibility regardless of the service model?
- a.Managing its own data and user access✓
- b.Securing the physical datacenter
- c.Maintaining the host hypervisor
- d.Replacing failed disks
The customer is always responsible for its data, identities, and access management no matter the model. Physical security, the hypervisor, and hardware maintenance are always Microsoft's responsibility.
A team wants to run applications without managing the underlying operating system, servers, or patching, but still deploy custom code. Which service model fits best?
- a.On-premises
- b.Software as a Service (SaaS)
- c.Infrastructure as a Service (IaaS)
- d.Platform as a Service (PaaS)✓
PaaS provides a managed platform where you deploy your own application code while Microsoft handles the OS, servers, and patching. IaaS still requires you to manage the OS, SaaS delivers finished applications with no custom code, and on-premises means you manage everything.
An organization keeps sensitive records in its own datacenter but bursts to Azure for extra capacity at peak times, connecting the two. Which deployment model is this?
- a.Public cloud
- b.Hybrid cloud✓
- c.Private cloud
- d.Community cloud
A hybrid cloud connects a private environment with the public cloud so workloads and data can move between them. A pure public or private cloud uses only one environment, and community cloud is shared among organizations with common concerns.
Which pair correctly distinguishes scalability from elasticity?
- a.Scalability adds capacity as planned; elasticity adds and removes it automatically with demand✓
- b.They are identical terms
- c.Scalability is automatic; elasticity is manual
- d.Elasticity only applies to storage
Scalability is the ability to increase capacity (often planned or manual), whereas elasticity automatically scales resources up and down in response to real-time demand. They are not identical, the roles are not reversed, and elasticity is not limited to storage.