Medium1 markMultiple Choice
Domain 2.1: Core Architectural ComponentsDomain 2ArchitectureAvailability ZonesCase Study
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Scenario: Contoso Ltd is migrating to Azure. They need to host a legacy application on a virtual machine, ensure the VM remains available if a datacenter fails, and track the costs of this specific application separately from other departments.<br/><br/>Which Azure service should Contoso use to host the legacy application?

AZ-900 · Question 59 · Domain 2.1: Core Architectural Components

Scenario: Contoso Ltd is migrating to Azure. They need to host a legacy application on a virtual machine, ensure the VM remains available if a datacenter fails, and track the costs of this specific application separately from other departments.<br/><br/>How can Contoso ensure the application remains available if a single datacenter fails?

Answer options:

A.

Deploy the VMs in a single Resource Group.

B.

Deploy the VMs across multiple Availability Zones.

C.

Use Azure ExpressRoute.

D.

Apply a CanNotDelete resource lock.

How to approach this question

Identify the architectural feature that provides datacenter-level redundancy.

Full Answer

B.Deploy the VMs across multiple Availability Zones.✓ Correct
Deploy the VMs across multiple Availability Zones.
Availability Zones are physically separate datacenters within an Azure region. By deploying VMs across multiple zones, you ensure that if one datacenter loses power or networking, the VMs in the other zones remain available.

Common mistakes

Confusing Availability Zones with Regions. A regional deployment protects against a whole region failing, but AZs specifically target datacenter failures within a region.

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