AZ-900 Azure Fundamentals Book: Study Guide & Exam Questions

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• 1. Part 1: Cloud Fundamentals and Service Models 58 questions
  • 1.1 Cloud Computing Fundamentals58 questions

    1. Match each responsibility to who is responsible for it in a cloud provider scenario (provider vs. consumer).

    • Physical security, power, cooling, and network connectivity
    • Information and data stored in the cloud
    • Devices allowed to connect (for example, phones and computers)
    • Physical datacenter, physical network, and physical hosts

    • Cloud provider
    • Consumer

    Show answer and explanation

    • Physical security, power, cooling, and network connectivity: Cloud provider
    • Information and data stored in the cloud: Consumer
    • Devices allowed to connect (for example, phones and computers): Consumer
    • Physical datacenter, physical network, and physical hosts: Cloud provider

    These physical and facility-level responsibilities belong to the provider.

    The consumer remains responsible for their data.

    The consumer controls which devices are allowed to connect.

    These are always owned and operated by the provider.

    2. A team uses a managed cloud SQL database service (not a self-managed database on a VM). Which responsibility remains with the customer?

    • Maintaining the actual database platform
    • Patching and updating the database engine
    • The data that gets ingested into the database
    • Power and cooling for the datacenter

    Show answer and explanation

    • The data that gets ingested into the database

    When using a cloud SQL database service, the provider maintains the database, but the customer is still responsible for the data ingested into the database.

    3. A team deploys a virtual machine and installs an SQL database on it. Compared with using a managed cloud SQL database service, what additional responsibility does the team take on?

    • Physical network connectivity in the datacenter
    • Database patches and updates
    • Physical host maintenance
    • Provider-run authentication platform operation

    Show answer and explanation

    • Database patches and updates

    If you install SQL on a VM, you are responsible for database patches and updates (in addition to maintaining your data).

    4. Order the service models by how much responsibility typically falls on the consumer (from most to least).

    • Infrastructure as a Service (IaaS)
    • Platform as a Service (PaaS)
    • Software as a Service (SaaS)

    Show answer

    1. Infrastructure as a Service (IaaS)
    2. Platform as a Service (PaaS)
    3. Software as a Service (SaaS)

    5. Which statement best defines cloud computing?

    • A method of purchasing physical servers for a private datacenter
    • The delivery of computing services over the internet
    • A networking protocol used to connect on-premises servers
    • A single service that provides only AI capabilities

    Show answer and explanation

    • The delivery of computing services over the internet

    Cloud computing is defined as delivering computing services over the internet, including infrastructure like VMs, storage, databases, and networking, plus services like IoT, ML, and AI.

    6. A key reason cloud computing can scale faster than a traditional datacenter is that cloud services are delivered over the internet and therefore are less constrained by physical infrastructure. What is the most direct implication of this?

    • Teams must always buy hardware months in advance to handle peak demand
    • Teams can rapidly expand capacity without building a new datacenter
    • Teams lose the ability to reduce capacity after a peak period ends
    • Teams must collocate staff in the provider’s datacenter to provision resources

    Show answer and explanation

    • Teams can rapidly expand capacity without building a new datacenter

    The source explains that because cloud services are delivered over the internet, you can rapidly expand IT footprint without waiting to build a new datacenter.

    7. Cloud platforms can provide global reach, enabling teams to place services closer to users and design for regional resilience without building multiple physical datacenters.

    • True
    • False

    Show answer and explanation

    • True

    The material explicitly states that cloud platforms offer global reach and support regional resilience without building multiple physical datacenters.

    8. Order the retail scaling approach from the scenario in a logical timeline.

    • Deploy additional compute capacity in the cloud for the launch period
    • Expect high traffic during a seasonal launch
    • Scale down capacity after the launch period ends

    Show answer

    1. Expect high traffic during a seasonal launch
    2. Deploy additional compute capacity in the cloud for the launch period
    3. Scale down capacity after the launch period ends

    9. Which cloud deployment model is defined as an environment used by a single entity with resources dedicated to one organization?

    • Public cloud
    • Private cloud
    • Hybrid cloud
    • Multicloud

    Show answer and explanation

    • Private cloud

    A private cloud is used by a single entity and keeps resources dedicated to one organization.

    10. What is a key distinguishing characteristic of a public cloud compared with a private cloud?

    • Resources are dedicated to a single organization
    • Anyone can purchase and use the cloud resources
    • It must be hosted in the customer’s on-site datacenter
    • It eliminates the need for identity and access management

    Show answer and explanation

    • Anyone can purchase and use the cloud resources

    Public cloud resources are generally available to anyone who wants to purchase cloud services; this public availability distinguishes it from private cloud.

    11. A hybrid cloud is an interconnected environment using both private and public clouds. Which scenario best illustrates a hybrid cloud “surge” use case?

    • Running all workloads only in a single public cloud provider
    • Keeping all services on-premises to maximize control
    • Temporarily deploying public cloud resources to handle increased demand beyond private capacity
    • Using two public cloud providers to compare pricing

    Show answer and explanation

    • Temporarily deploying public cloud resources to handle increased demand beyond private capacity

    Hybrid cloud can allow a private cloud to surge for temporary demand by deploying public cloud resources.

    12. In a multicloud scenario, an organization uses multiple public cloud providers and must manage resources and security across those providers.

    • True
    • False

    Show answer and explanation

    • True

    Multicloud is defined as using two (or more) public cloud providers and managing resources and security in both environments.

    13. Match the Azure offering to the scenario it addresses.

    • Managing environments across Azure-only, private, hybrid, and multicloud configurations
    • Running existing VMware workloads in Azure with integration and scalability

    • Azure Arc
    • Azure VMware Solution

    Show answer and explanation

    • Managing environments across Azure-only, private, hybrid, and multicloud configurations: Azure Arc
    • Running existing VMware workloads in Azure with integration and scalability: Azure VMware Solution

    Azure Arc helps manage cloud environments across these configurations.

    Azure VMware Solution supports VMware workload migration and operation in Azure.

    14. Which description best captures the purpose of Microsoft Azure as a cloud platform?

    • A platform that only provides virtual machines for running custom software
    • A cloud computing platform with an expanding set of services to build solutions ranging from simple to complex
    • A private datacenter product that must be hosted on-site by the customer
    • A single-purpose service focused only on storage and backups

    Show answer and explanation

    • A cloud computing platform with an expanding set of services to build solutions ranging from simple to complex

    Azure is described as a cloud computing platform with an ever-expanding set of services that help you build solutions meeting technical goals, spanning simple to complex workloads.

    15. Match each Azure capability area to an example service type it supports.

    • Running fully virtualized computers for custom software solutions
    • Remote storage services
    • Database hosting
    • Centralized account management

    • Compute
    • Databases
    • Identity/account management
    • Storage

    Show answer and explanation

    • Running fully virtualized computers for custom software solutions: Compute
    • Remote storage services: Storage
    • Database hosting: Databases
    • Centralized account management: Identity/account management

    Virtualized computers are a compute capability.

    Remote storage is a storage capability.

    Hosting databases is a database capability.

    Centralized account management relates to identity and accounts.

    16. In a consumption-based cloud model, what is the most accurate description of how costs relate to resource usage?

    • You pay a fixed cost regardless of whether resources are used
    • You pay for the resources you consume and can stop paying by releasing them
    • You must purchase maximum capacity up front to avoid outages
    • You pay only for physical servers you personally maintain

    Show answer and explanation

    • You pay for the resources you consume and can stop paying by releasing them

    The consumption-based model means you pay for the IT resources you use and can release them when done, rather than paying for idle capacity.

    17. Match each budgeting term to its meaning.

    • Up-front spending on physical infrastructure such as servers, network hardware, and datacenter space
    • Ongoing spending on services over time

    • CapEx
    • OpEx

    Show answer and explanation

    • Up-front spending on physical infrastructure such as servers, network hardware, and datacenter space: CapEx
    • Ongoing spending on services over time: OpEx

    Capital expenditure (CapEx) is up-front investment in physical infrastructure.

    Operational expenditure (OpEx) is ongoing service spending.

    18. Because cloud services are paid for as they are consumed, cloud computing is typically classified as an operational expense (OpEx).

    • True
    • False

    Show answer and explanation

    • True

    The source explicitly states that paying for cloud services as you consume them classifies cloud computing as OpEx.

    19. A team running an on-premises datacenter underestimates future demand, and performance degrades. According to the traditional capacity planning model, what typically must happen to fix the shortfall?

    • Order, install, and provision additional hardware (plus power and cooling)
    • Instantly add capacity without any procurement or installation
    • Release unused resources to reduce cost
    • Shift physical security responsibilities to a cloud provider

    Show answer and explanation

    • Order, install, and provision additional hardware (plus power and cooling)

    In a traditional datacenter, fixing underestimation requires ordering, installing, and provisioning additional hardware, power, and cooling.

    20. Order the cloud scaling actions for handling a demand spike using virtual machines.

    • Add virtual machines when more capacity is needed
    • Remove virtual machines when demand drops (scale back in)
    • Scale out during peak demand

    Show answer

    1. Add virtual machines when more capacity is needed
    2. Scale out during peak demand
    3. Remove virtual machines when demand drops (scale back in)

    21. In which cloud styles can you install physical servers?

    • private cloud and hybrid cloud only
    • private cloud only
    • private cloud, hybrid cloud and public cloud
    • hybrid cloud only

    Show answer and explanation

    • private cloud and hybrid cloud only

    Own physical machines can only live where you control the building, namely a private cloud and the on-premises side of hybrid. Public cloud hardware belongs entirely to the provider, so customers cannot install their own servers there.

    Fifty virtual machines run on premises and fifty run in Azure, with links between the two fleets.

    22. Which cloud style does this arrangement represent?

    • hybrid
    • private
    • public

    Show answer and explanation

    • hybrid

    Interconnected on-premises and Azure estates spanning private and public resources form hybrid cloud. Either side alone would be solely private or solely public.

    Several servers will leave an on-premises network for Azure.

    23. What strength does a public cloud service offer over keeping the servers on premises?

    • The public cloud is owned by the general public rather than a private business
    • The public cloud is a crowd-sourced effort that lets firms improve the cloud
    • Every public cloud asset is openly reachable by any member of the public
    • The public cloud is a shared estate where many firms each consume a slice of the capacity

    Show answer and explanation

    • The public cloud is a shared estate where many firms each consume a slice of the capacity

    A public cloud is a multitenant estate owned by the provider where many organizations each consume a slice, gaining scale without hardware ownership. It is not owned by the general public, is not crowd-sourced, and customer data is not openly reachable.

    Each cloud style must be tied to the strength it best provides.

    24. Link each cloud style to its correct strength.

    • Operates without any upfront hardware purchase
    • Keeps full direction over protection
    • Allows placement on local resources or cloud resources at will

    • Hybrid Cloud
    • Private Cloud
    • Public Cloud

    Show answer and explanation

    • Operates without any upfront hardware purchase: Public Cloud
    • Keeps full direction over protection: Private Cloud
    • Allows placement on local resources or cloud resources at will: Hybrid Cloud

    Renting shared capacity avoids upfront buying.

    Single-tenant ownership allows strict security direction.

    Splitting estates lets each workload sit where it fits best.

    25. Which two traits describe the public cloud?

    • dedicated hardware
    • unsecured connections
    • limited storage
    • metered pricing
    • self-service management

    Show answer and explanation

    • metered pricing
    • self-service management

    Public cloud billing is metered, so consumption decides cost, and customers self-provision through portal, command-line or APIs. Hardware is shared across tenants rather than dedicated, links can be protected, and available storage appears effectively boundless.

    26. In which cloud style does a third party own the hardware pooled among many tenants?

    • private
    • hybrid
    • public

    Show answer and explanation

    • public

    In public cloud a third-party provider builds, owns and looks after hardware shared by many tenants. Private cloud is devoted to one organization, and hybrid mixes the two, so only public fits the description.

    27. An organization hosting its infrastructure ____ eliminates the need to maintain its own data center.

    • in a hybrid cloud
    • in a private cloud
    • in the public cloud
    • on a Hyper-V host

    Show answer

    • An organization hosting its infrastructure in the public cloud eliminates the need to maintain its own data center.

    A firm wishes to build a cloud solution with Azure Government, which admits only particular client categories.

    28. Listed in alphabetical order, the two eligible customer kinds are ____ and ____.

    • A European government contractor.
    • A European government entity.
    • A government contractor from any country.
    • A government entity from any country.
    • A United States government contractor.
    • A United States government entity.

    Show answer

    • Listed in alphabetical order, the two eligible customer kinds are A United States government contractor. and A United States government entity..

    29. A firm can grow a private cloud by placing its own physical servers inside the public cloud.

    • True
    • False

    Show answer and explanation

    • False

    Public hardware is owned by the provider. A tenant cannot insert its own physical servers into the public estate.

    30. Assembling a hybrid cloud requires deploying assets to the public cloud.

    • True
    • False

    Show answer and explanation

    • True

    Hybrid by definition pairs private or on-premises capacity with public cloud capacity, so public resources must be present.

    31. A private cloud has to stay separated from the internet.

    • True
    • False

    Show answer and explanation

    • False

    Private means devoted to one tenant, not cut off from the network. It may still serve traffic over the internet.

    32. Achieving a hybrid cloud always requires migrating outward from a private cloud design.

    • True
    • False

    Show answer and explanation

    • False

    Hybrid blends public resources with on-premises or private infrastructure. It does not require beginning as a private cloud and then migrating.

    33. An organization can grow its internal network capacity by drawing on the public cloud.

    • True
    • False

    Show answer and explanation

    • True

    Public capacity can be attached to an internal network to absorb surges or add space without building locally.

    34. Under a public cloud design, solely guest users of the firm can reach cloud resources.

    • True
    • False

    Show answer and explanation

    • False

    Public cloud services are purchasable by any customer, and your own identity and access rules decide who reaches your resources. Access is not confined to guest accounts.

    35. Putting a hybrid cloud into place requires the firm to keep an internal network.

    • True
    • False

    Show answer and explanation

    • True

    Hybrid joins local or private infrastructure with public cloud, so the firm must retain its own internal network to connect the two sides.

    36. A firm can enlarge its internal computing pool with a hybrid cloud.

    • True
    • False

    Show answer and explanation

    • True

    Hybrid lets internal computing spill over into public cloud for temporary peaks or growth.

    37. Under a public cloud design, solely guest users of the firm can reach cloud resources.

    • True
    • False

    Show answer and explanation

    • False

    Identity and access controls decide who reaches public resources. Use is not restricted to guest accounts.

    An on-premises network contains 100 servers. Leaders want more capacity for users while holding down both upfront and running costs.

    38. What approach should be suggested?

    • a complete migration to the public cloud
    • an additional data center
    • a private cloud
    • a hybrid cloud

    Show answer and explanation

    • a hybrid cloud

    Hybrid cloud retains the current servers and bursts into rented public capacity on demand, avoiding fresh hardware outlay. A new data center or private cloud demands heavy upfront buying plus upkeep, while a full move to public cloud discards the existing investment when only extra capacity is wanted.

    39. An Azure web app that queries an on-premises Microsoft SQL server exemplifies a ____ cloud.

    • hybrid
    • multi-vendor
    • private
    • public

    Show answer

    • An Azure web app that queries an on-premises Microsoft SQL server exemplifies a hybrid cloud.

    40. An organization can expand its internal network by installing its own physical servers inside the public cloud.

    • True
    • False

    Show answer and explanation

    • False

    All hardware in the public cloud is owned by the provider; a company cannot install its own physical servers there.

    41. A private cloud has to stay disconnected from the internet.

    • True
    • False

    Show answer and explanation

    • False

    A private cloud is dedicated to one organization but may still deliver services over the internet.

    42. A hybrid cloud includes public cloud resources as one of its parts.

    • True
    • False

    Show answer and explanation

    • True

    A hybrid cloud joins public cloud resources with private or on-premises resources.

    43. Using cloud computing requires owning physical servers.

    • True
    • False

    Show answer and explanation

    • False

    The provider owns and operates the physical servers; customers consume virtualized resources without owning hardware.

    44. Using cloud computing requires internet connectivity.

    • True
    • False

    Show answer and explanation

    • True

    Cloud services are delivered over the internet, so connectivity is needed to reach and manage them.

    45. Growing capacity in the cloud costs less than growing capacity in an on-premises datacenter.

    • True
    • False

    Show answer and explanation

    • True

    Cloud expansion needs no up-front hardware or datacenter build-out, while on-premises expansion requires buying, installing and maintaining new hardware.

    46. Which cloud deployment model joins on-premises and cloud-based resources?

    • hybrid
    • public
    • private

    Show answer and explanation

    • hybrid

    Hybrid cloud uses on-premises infrastructure together with public cloud resources. Public cloud alone uses only provider-owned resources and private cloud alone uses only resources dedicated to one organization.

    47. With consumption-based pricing you pay one fixed rate for all data sent to or from cloud-hosted virtual machines.

    • True
    • False

    Show answer and explanation

    • False

    In a consumption model you pay for what you actually use, so transfer is charged by amount rather than a fixed rate.

    48. With consumption-based pricing you cut overall spend by paying for additional capacity only when required.

    • True
    • False

    Show answer and explanation

    • True

    You avoid paying upfront for peak capacity and pay for extra resources only while you need them.

    49. Serverless computing is an example of a consumption-based plan.

    • True
    • False

    Show answer and explanation

    • True

    Serverless offerings such as Azure Functions on the Consumption plan bill only for executions and resources used while code runs.

    50. An organization keeps full authority over resources and protection in its private cloud deployment.

    • True
    • False

    Show answer and explanation

    • True

    A private cloud is dedicated to one organization, so that organization retains full authority over its resources and protection.

    51. With a hybrid cloud, a business can decide whether each workload operates in its own datacenter or in the public cloud.

    • True
    • False

    Show answer and explanation

    • True

    A hybrid cloud joins a local datacenter with public cloud, so the business can decide for each workload whether it operates on-premises or in the cloud.

    52. Enlarging a virtual machine hosted in the public cloud counts as capital spending for the tenant.

    • True
    • False

    Show answer and explanation

    • False

    Enlarging a public-cloud virtual machine is billed as pay-as-you-go operational spending; no upfront hardware purchase is involved.

    53. Pay-as-you-go billing follows the consumption-based approach.

    • True
    • False

    Show answer and explanation

    • True

    Pay-as-you-go means paying only for what is consumed, which is the definition of the consumption-based model.

    54. Fees paid to a cloud provider are classified as capital expenditure.

    • True
    • False

    Show answer and explanation

    • False

    Fees paid to a cloud provider for consumed services are ongoing operating costs, not upfront investment in physical assets.

    55. Services billed under the consumption model fall under operational expenditure.

    • True
    • False

    Show answer and explanation

    • True

    Consumption-based services are paid incrementally as they are used, which is operational expenditure.

    56. Cloud adoption brings lower upfront capital costs than building an on-premises deployment.

    • True
    • False

    Show answer and explanation

    • True

    Cloud consumption is paid as operational spending, avoiding large upfront hardware and datacenter outlay.

    57. Cloud adoption offers exactly the same configuration choices as an on-premises deployment.

    • True
    • False

    Show answer and explanation

    • False

    On-premises owners control every hardware and software layer, while cloud tenants can configure only what the provider exposes for the chosen service model.

    58. Cloud capacity can be adjusted up or down whenever business needs shift.

    • True
    • False

    Show answer and explanation

    • True

    Cloud capacity can be grown or shrunk on demand as business needs shift.

In what order?