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Difficulty: MediumHigh Availability, Scalability, and Elasticity

A healthcare provider deploys a patient portal application on Azure. The application must remain continuously operational even if a localized power or cooling failure affects an entire physical data center building within the host region. To meet this requirement, the application is deployed across multiple Azure Availability Zones.

Which cloud concept is this deployment strategy primarily designed to achieve?

  1. A
    Multi-region high availability by deploying to Availability Zones that span multiple separate geographical regions
  2. High availabilityAnswer
  3. C
    Disaster recovery
  4. D
    Elasticity

Answer

High availability
The correct answer is high availability because deploying across multiple Availability Zones provides localized physical redundancy within a single region, allowing the application to survive a data center outage without downtime.

Step-by-Step Solution

1
Identify the scope of the problem to solve in the scenario.
The application needs to withstand a localized data center building failure (power/cooling outage) within a single host region.
Determining the scale of the failure helps distinguish between local fault tolerance and regional recovery.
2
Evaluate the architectural mitigation of utilizing Availability Zones.
Availability Zones provide physically isolated data centers with redundant power, cooling, and networking within a single region.
This establishes that the solution uses intra-region physical redundancy to prevent downtime.
3
Align the goal of maintaining uptime during localized failures with the correct cloud concept.
Ensuring the application remains continuously accessible despite local component failures represents High Availability.
High Availability focuses on maximizing service availability and eliminating single points of failure within a region.

Key Concept

High Availability is the practice of designing a system to remain accessible and operational during localized component or infrastructure failures within a single region.
Estimated Time:1m 0s
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Topics

High Availability, Scalability, and Elasticity

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