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Difficulty: EasyHigh Availability, Scalability, and Elasticity

An e-commerce company is planning to deploy its web application to Microsoft Azure. The company has two primary requirements:
1. The application must automatically add or remove virtual machines to match traffic fluctuations.
2. The application must remain accessible if a single hardware rack in the datacenter fails.

Which two cloud concepts directly address these requirements? (Select two.)

  1. ElasticityAnswer
  2. High availabilityAnswer
  3. C
    Disaster recovery
  4. D
    Vertical scaling

Answer

Elasticity and high availability
Elasticity allows a system to dynamically allocate and deallocate resources to match demand, satisfying the requirement to add or remove virtual machines automatically. High availability ensures that application workloads remain operational and accessible during localized infrastructure failures, such as a hardware rack failure, satisfying the second requirement.

Step-by-Step Solution

1
Analyze the first requirement: automatically adding or removing virtual machines to match traffic fluctuations.
Identify that dynamic adjustments to resource count based on demand fluctuations correspond to elasticity.
Elasticity deals with matching resource capacity to dynamic demand automatically.
2
Analyze the second requirement: keeping the application accessible during a single local hardware rack failure.
Identify that maintaining availability during minor localized physical faults within a datacenter corresponds to high availability.
High availability ensures minimal service interruption by running workloads with redundancy inside the primary site.
3
Evaluate the choices to find the options matching elasticity and high availability.
Determine that elasticity and high availability are the correct selections.
These terms map directly to the defined scenario requirements.

Key Concept

Understanding High Availability and Elasticity in Microsoft Azure
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Topics

High Availability, Scalability, and Elasticity

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