Microsoft AZ-900 CERTIFICATION EXAM
Practice Exam 2026 Edition Questions with Answers &
Detailed Rationales
Question 1
Which of the following best defines cloud computing?
A) A model where organizations purchase and maintain their own physical servers
on-premises
B) The on-demand delivery of IT resources and applications over the internet with
pay-as-you-go pricing
C) A software installation method that requires local hardware configuration
D) A networking protocol used exclusively for private data centers
Answer: B
Rationale for A: Incorrect. This describes traditional on-premises infrastructure,
not cloud computing. Cloud computing specifically avoids the need for
organizations to own and maintain physical hardware.
Rationale for B: Correct. Cloud computing is defined by Microsoft as the on-
demand delivery of IT resources (compute, storage, networking, applications)
over the internet with pay-as-you-go pricing, enabling rapid provisioning and
scalability.
Rationale for C: Incorrect. Cloud computing reduces or eliminates the need for
local hardware configuration; software is typically accessed via web interfaces or
APIs.
Rationale for D: Incorrect. Cloud computing is a service delivery model, not a
networking protocol. While networking is involved, this definition is too narrow
and technically inaccurate.
,Question 2
In the shared responsibility model for cloud computing, which responsibility
ALWAYS remains with the customer regardless of service model (IaaS, PaaS,
SaaS)?
A) Physical security of datacenters
B) Patching of host operating systems
C) Data classification and account management
D) Network infrastructure maintenance
Answer: C
Rationale for A: Incorrect. Physical security of datacenters is ALWAYS the cloud
provider's responsibility across all service models.
Rationale for B: Incorrect. In PaaS and SaaS models, the provider handles OS
patching; only in IaaS does the customer manage guest OS patching.
Rationale for C: Correct. Regardless of service model, customers are always
responsible for their data: classification, encryption, access management, identity
controls, and compliance requirements related to their content.
Rationale for D: Incorrect. Network infrastructure (physical switches, routers,
cabling) is managed by the cloud provider in all service models.
Question 3
A company wants to keep sensitive financial data on-premises while using cloud
resources for public-facing web applications. Which cloud deployment model
BEST fits this scenario?
A) Public cloud
B) Private cloud
C) Hybrid cloud
D) Community cloud
Answer: C
,Rationale for A: Incorrect. A public cloud hosts all resources with a third-party
provider; it doesn't support keeping sensitive data on-premises while using cloud
for other workloads.
Rationale for B: Incorrect. A private cloud is dedicated to a single organization but
doesn't inherently combine on-premises and cloud resources.
Rationale for C: Correct. Hybrid cloud combines on-premises infrastructure with
public cloud services, allowing organizations to keep sensitive workloads on-
premises while leveraging cloud scalability for public-facing applications.
Rationale for D: Incorrect. Community cloud is shared by several organizations
with common concerns; it doesn't specifically address mixing on-premises and
cloud resources.
Question 4
Which pricing model describes paying only for the compute resources you
actually consume, rather than provisioning capacity in advance?
A) Capital Expenditure (CapEx)
B) Operational Expenditure (OpEx)
C) Consumption-based model
D) Reserved instance pricing
Answer: C
Rationale for A: Incorrect. CapEx refers to upfront investments in physical
infrastructure; it's a financial accounting term, not a cloud pricing model.
Rationale for B: Incorrect. OpEx refers to ongoing operational costs; while cloud
often shifts costs to OpEx, this term doesn't specifically describe pay-per-use
pricing.
Rationale for C: Correct. The consumption-based model (also called pay-as-you-
go) charges only for resources actually used, with no upfront commitment,
aligning costs directly with usage.
, Rationale for D: Incorrect. Reserved instances offer discounted pricing for
committing to use resources for 1-3 years; they reduce cost but require advance
capacity planning.
Question 5
What is the PRIMARY financial advantage of cloud computing's consumption-
based model compared to traditional on-premises infrastructure?
A) Eliminates the need for IT staff
B) Converts capital expenditure (CapEx) to operational expenditure (OpEx)
C) Guarantees lower total cost of ownership
D) Removes all security responsibilities
Answer: B
Rationale for A: Incorrect. Cloud computing still requires IT staff for architecture,
management, and governance; it changes their focus but doesn't eliminate the
need.
Rationale for B: Correct. The consumption-based model shifts costs from large
upfront capital investments (CapEx) to ongoing operational expenses (OpEx),
improving cash flow and financial flexibility.
Rationale for C: Incorrect. While cloud CAN reduce TCO, it's not guaranteed; poor
architecture or unused resources can increase costs. TCO depends on
implementation.
Rationale for D: Incorrect. Security is a shared responsibility; cloud providers
secure the infrastructure, but customers remain responsible for data, access, and
application security.
Question 6
Which cloud service model provides the customer with the MOST control over the
operating system, applications, and data?
A) Software as a Service (SaaS)
B) Platform as a Service (PaaS)
Practice Exam 2026 Edition Questions with Answers &
Detailed Rationales
Question 1
Which of the following best defines cloud computing?
A) A model where organizations purchase and maintain their own physical servers
on-premises
B) The on-demand delivery of IT resources and applications over the internet with
pay-as-you-go pricing
C) A software installation method that requires local hardware configuration
D) A networking protocol used exclusively for private data centers
Answer: B
Rationale for A: Incorrect. This describes traditional on-premises infrastructure,
not cloud computing. Cloud computing specifically avoids the need for
organizations to own and maintain physical hardware.
Rationale for B: Correct. Cloud computing is defined by Microsoft as the on-
demand delivery of IT resources (compute, storage, networking, applications)
over the internet with pay-as-you-go pricing, enabling rapid provisioning and
scalability.
Rationale for C: Incorrect. Cloud computing reduces or eliminates the need for
local hardware configuration; software is typically accessed via web interfaces or
APIs.
Rationale for D: Incorrect. Cloud computing is a service delivery model, not a
networking protocol. While networking is involved, this definition is too narrow
and technically inaccurate.
,Question 2
In the shared responsibility model for cloud computing, which responsibility
ALWAYS remains with the customer regardless of service model (IaaS, PaaS,
SaaS)?
A) Physical security of datacenters
B) Patching of host operating systems
C) Data classification and account management
D) Network infrastructure maintenance
Answer: C
Rationale for A: Incorrect. Physical security of datacenters is ALWAYS the cloud
provider's responsibility across all service models.
Rationale for B: Incorrect. In PaaS and SaaS models, the provider handles OS
patching; only in IaaS does the customer manage guest OS patching.
Rationale for C: Correct. Regardless of service model, customers are always
responsible for their data: classification, encryption, access management, identity
controls, and compliance requirements related to their content.
Rationale for D: Incorrect. Network infrastructure (physical switches, routers,
cabling) is managed by the cloud provider in all service models.
Question 3
A company wants to keep sensitive financial data on-premises while using cloud
resources for public-facing web applications. Which cloud deployment model
BEST fits this scenario?
A) Public cloud
B) Private cloud
C) Hybrid cloud
D) Community cloud
Answer: C
,Rationale for A: Incorrect. A public cloud hosts all resources with a third-party
provider; it doesn't support keeping sensitive data on-premises while using cloud
for other workloads.
Rationale for B: Incorrect. A private cloud is dedicated to a single organization but
doesn't inherently combine on-premises and cloud resources.
Rationale for C: Correct. Hybrid cloud combines on-premises infrastructure with
public cloud services, allowing organizations to keep sensitive workloads on-
premises while leveraging cloud scalability for public-facing applications.
Rationale for D: Incorrect. Community cloud is shared by several organizations
with common concerns; it doesn't specifically address mixing on-premises and
cloud resources.
Question 4
Which pricing model describes paying only for the compute resources you
actually consume, rather than provisioning capacity in advance?
A) Capital Expenditure (CapEx)
B) Operational Expenditure (OpEx)
C) Consumption-based model
D) Reserved instance pricing
Answer: C
Rationale for A: Incorrect. CapEx refers to upfront investments in physical
infrastructure; it's a financial accounting term, not a cloud pricing model.
Rationale for B: Incorrect. OpEx refers to ongoing operational costs; while cloud
often shifts costs to OpEx, this term doesn't specifically describe pay-per-use
pricing.
Rationale for C: Correct. The consumption-based model (also called pay-as-you-
go) charges only for resources actually used, with no upfront commitment,
aligning costs directly with usage.
, Rationale for D: Incorrect. Reserved instances offer discounted pricing for
committing to use resources for 1-3 years; they reduce cost but require advance
capacity planning.
Question 5
What is the PRIMARY financial advantage of cloud computing's consumption-
based model compared to traditional on-premises infrastructure?
A) Eliminates the need for IT staff
B) Converts capital expenditure (CapEx) to operational expenditure (OpEx)
C) Guarantees lower total cost of ownership
D) Removes all security responsibilities
Answer: B
Rationale for A: Incorrect. Cloud computing still requires IT staff for architecture,
management, and governance; it changes their focus but doesn't eliminate the
need.
Rationale for B: Correct. The consumption-based model shifts costs from large
upfront capital investments (CapEx) to ongoing operational expenses (OpEx),
improving cash flow and financial flexibility.
Rationale for C: Incorrect. While cloud CAN reduce TCO, it's not guaranteed; poor
architecture or unused resources can increase costs. TCO depends on
implementation.
Rationale for D: Incorrect. Security is a shared responsibility; cloud providers
secure the infrastructure, but customers remain responsible for data, access, and
application security.
Question 6
Which cloud service model provides the customer with the MOST control over the
operating system, applications, and data?
A) Software as a Service (SaaS)
B) Platform as a Service (PaaS)
