AZ-900 Azure Fundamentals Practice Questions with Explanations

Free AZ-900 Azure Fundamentals practice questions with an explanation for every answer. Covers cloud concepts, Azure architecture, Azure services, and Azure management, including the shared responsibility model and pricing.

162 questions · Cloud Computing · by Study Foxy

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Questions

  1. What is cloud computing?

    • Delivering computing services over the internet
    • Storing all company data on local servers
    • Buying hardware up front to run in-house
    • Linking office computers together on one local network

  2. In the shared responsibility model, which is ALWAYS the customer's responsibility, no matter the service type?

    • The data and information they store
    • The physical datacenter building and its power
    • The physical network hardware
    • The physical host servers

  3. In the shared responsibility model, which is ALWAYS Microsoft's responsibility?

    • Physical security of the datacenter
    • Classifying the customer's data
    • Managing the customer's user accounts
    • Securing employees' laptops and phones

  4. With IaaS, who is responsible for patching the guest operating system on a VM?

    • The customer
    • Microsoft
    • The hardware vendor
    • No one; it patches itself

  5. As you move from IaaS to PaaS to SaaS, what happens to the customer's share of responsibility?

    • It decreases
    • It increases
    • It stays the same
    • It moves to end users

  6. Which cloud model is owned by a provider and shares infrastructure among many organizations?

    • Public cloud
    • Private cloud
    • Hybrid cloud
    • On-premises datacenter

  7. A company needs complete control of its cloud hardware and won't share it with other organizations. Which cloud model fits?

    • Private cloud
    • Public cloud
    • Multi-cloud
    • Community cloud

  8. A business keeps sensitive data in its own datacenter but uses Azure for extra capacity in busy seasons. Which model is this?

    • Hybrid cloud
    • Public cloud
    • Private cloud
    • Community cloud

  9. A company runs some workloads on Azure and others on a second public cloud provider. What is this called?

    • Multi-cloud
    • Hybrid cloud
    • Private cloud
    • Edge computing

  10. What does the consumption-based model mean?

    • You pay only for the resources you use
    • You pay a fixed fee no matter the usage
    • You buy servers before you need them
    • You pay once for a lifetime license

  11. Moving from an on-premises datacenter to pay-as-you-go cloud mainly shifts spending from:

    • CapEx to OpEx
    • OpEx to CapEx
    • Variable to upfront costs
    • Monthly bills to hardware buys

  12. A workload will run nonstop for 3 years at a steady size. Which pricing option usually lowers its VM cost the most without risk of eviction?

    • Reserved instances
    • Pay-as-you-go pricing
    • Spot VM pricing
    • Free account credit

  13. A batch job can be stopped and restarted at any time. Which VM option is usually the cheapest?

    • Azure Spot VMs
    • Reserved instances
    • Dedicated hosts
    • Pay-as-you-go VMs

  14. Which statement best describes serverless computing?

    • You run code without managing servers
    • Your code runs with no servers at all
    • You rent whole physical servers
    • You manage the OS but not the hardware

  15. Which Azure service is an example of serverless compute?

    • Azure Functions
    • Azure Virtual Machines
    • Azure Dedicated Host
    • Virtual Machine Scale Sets

  16. In a public cloud, the customer is responsible for maintaining the physical hardware.

    True or false

  17. Which are benefits of the consumption-based model? (Select all that apply.)

    • No upfront infrastructure costs
    • Pay for extra capacity only when needed
    • A guaranteed fixed monthly bill
    • Hardware the company owns outright

  18. What does high availability focus on?

    • Keeping services up with little downtime
    • Lowering the monthly cost of services
    • Adding resources as demand grows
    • Encrypting all stored data at rest by default

  19. How does Azure state the uptime it commits to for a service?

    • In a service-level agreement (SLA)
    • In a resource lock
    • In a management group
    • In the Azure Policy compliance dashboard

  20. A service has a 99.9% SLA. About how much downtime does that allow in a 30-day month?

    • About 43 minutes
    • About 4.3 minutes
    • About 4.3 hours
    • About 8.8 hours

  21. An app needs a web app (99.95% SLA) and a database (99.99% SLA), and both must work. What is the composite SLA?

    • About 99.94%
    • 99.99%
    • 99.95%
    • 99.97%

  22. Adding more CPU and memory to an existing VM is called:

    • Vertical scaling
    • Horizontal scaling
    • Elastic failover
    • Geo-replication

  23. Adding more VM instances to share the load is called:

    • Horizontal scaling
    • Vertical scaling
    • Scaling down
    • Fault tolerance

  24. A shopping site automatically adds servers on Black Friday and removes them afterward. Which benefit is this?

    • Elasticity
    • Predictability
    • Governance
    • Durability

  25. Which benefit describes a system's ability to recover from failures and keep working?

    • Reliability
    • Scalability
    • Manageability
    • Agility

  26. Predictability in the cloud focuses on which two areas?

    • Performance and cost
    • Security and identity
    • Storage and networking
    • Compliance and auditing

  27. How does the cloud help with governance?

    • Policies and templates enforce your rules
    • It removes all compliance requirements
    • Microsoft writes your company's own rules
    • It hides resources from your auditors

  28. Which is an example of management OF the cloud (rather than management IN the cloud)?

    • Autoscaling resources based on demand
    • Using the Azure portal to manage resources
    • Running commands in the Azure CLI
    • Calling REST APIs to change resources

  29. Horizontal scaling adds more instances of a resource.

    True or false

  30. A web app must stay online if one server fails and must handle traffic spikes. Which benefits does it need? (Select all that apply.)

    • High availability
    • Scalability
    • Sovereignty
    • Predictable billing

  31. Which cloud service type gives the customer the most control?

    • IaaS
    • PaaS
    • SaaS
    • Serverless

  32. Which cloud service type leaves the customer the least to manage?

    • SaaS
    • IaaS
    • PaaS
    • Private cloud

  33. Azure Virtual Machines are an example of:

    • IaaS
    • PaaS
    • SaaS
    • On-premises

  34. Microsoft 365 (Outlook, Word, Teams) is an example of:

    • SaaS
    • IaaS
    • PaaS
    • Hybrid cloud

  35. Azure App Service is an example of:

    • PaaS
    • IaaS
    • SaaS
    • Private cloud

  36. A company wants to move existing servers to Azure with as few changes as possible (lift-and-shift). Which service type fits?

    • IaaS
    • PaaS
    • SaaS
    • Serverless

  37. Developers want to build and deploy an app without managing the OS or servers. Which service type fits?

    • PaaS
    • IaaS
    • SaaS
    • On-premises

  38. A business wants ready-made email for its staff with no software to install or manage. Which service type fits?

    • SaaS
    • IaaS
    • PaaS
    • Hybrid cloud

  39. In PaaS, who manages the operating system?

    • The cloud provider
    • The customer
    • The end users
    • A third-party vendor

  40. In SaaS, which stays the customer's responsibility?

    • Accounts and the data they store
    • Patching the application
    • The host operating system
    • The physical network

  41. Which is a typical IaaS use case?

    • Quick test and dev environments
    • Ready-to-use email for staff
    • Hosting a web app with no OS work
    • Online document editing

  42. In IaaS, which does the cloud provider manage?

    • The physical servers and network
    • The guest OS updates
    • The applications installed on the VM
    • The user accounts

  43. In SaaS, the provider manages the application software.

    True or false

  44. Which of these are PaaS offerings? (Select all that apply.)

    • Azure App Service
    • Azure SQL Database
    • Azure Virtual Machines
    • Microsoft 365

  45. What is an Azure region?

    • A geographic area with one or more datacenters
    • A single server rack in one datacenter
    • A group of subscriptions under one bill
    • A logical container for related resources

  46. What is an availability zone?

    • Separate datacenters in a region
    • A pair of regions in the same country
    • A logical group of related resources
    • A billing boundary for an account

  47. How many availability zones does a zone-enabled region have, at minimum?

    • 3
    • 1
    • 2
    • 5

  48. Why does Azure pair regions?

    • For disaster recovery across regions
    • To split one bill evenly between two regions
    • To double VM performance
    • To share one availability zone

  49. When possible, how far apart are paired regions?

    • At least 300 miles
    • At least 3 miles
    • At least 30 miles
    • At least 3,000 miles

  50. What is a sovereign region?

    • A separate Azure instance for compliance
    • A region reserved for Microsoft employees
    • Any region outside the United States
    • A region that has no availability zones

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