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Difficulty: MediumHigh Availability, Scalability, and Elasticity

An online banking service requires that its transaction processing system remain fully operational and accessible to clients during a localized power grid failure at one of the physical data centers within an Azure region. To achieve this, the architecture team configures the service to distribute its workloads across multiple separate physical locations within that single region. Which cloud concept does this design directly address?

  1. A
    Elasticity
  2. B
    Disaster recovery
  3. High availabilityAnswer
  4. D
    Geographic replication

Answer

High availability is the cloud concept that ensures services remain operational and accessible with minimal downtime by using local redundancy within the same region.
High availability is designed to keep services operational and accessible with minimal downtime by offering localized redundancy (such as multiple availability zones) within a single region, safeguarding against localized hardware or power grid failures.

Step-by-Step Solution

1
Analyze the scenario requirements.
The requirement is to keep the banking service operational during a local power failure within a single Azure region by distributing workloads across physical locations in that same region.
This establishes that the solution targets local redundancy and continuous uptime rather than cross-region recovery or dynamic resource scaling based on workload volume.
2
Compare the requirements with cloud concepts.
Local redundancy to maintain continuous uptime within a single region maps directly to high availability. Disaster recovery focuses on regional failover, elasticity adjusts resources dynamically to demand, and geographic replication spans across different regions.
By matching the definition of local service uptime to high availability, we identify the correct cloud concept.

Key Concept

High Availability vs Disaster Recovery, Elasticity, and Geographic Replication
Estimated Time:1m 0s
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Topics

High Availability, Scalability, and Elasticity

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