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Difficulty: MediumReliability, Predictability, and Disaster Recovery

A global logistics firm is migrating its supply chain dashboard to Microsoft Azure. The system must meet strict requirements for both performance consistency during high-demand events and business continuity in the event of a severe outage.

Which of the following statements correctly describe how the company should implement reliability, predictability, or disaster recovery in Azure? (Select two)

  1. Implementing autoscaling to dynamically adjust virtual machine instances helps maintain consistent response times during peak demand, demonstrating performance predictability.Answer
  2. B
    Replicating databases across multiple Availability Zones within the same Azure region is the primary strategy to achieve disaster recovery during a complete region-wide failure.
  3. Configuring virtual machine replication to a secondary, paired Azure region using Azure Site Recovery ensures business continuity, representing a disaster recovery strategy.Answer
  4. D
    Relying on manual vertical scaling (scaling up) to dynamically adjust server sizes is the primary method used to achieve cloud elasticity for rapidly fluctuating, minute-by-minute traffic spikes.

Answer

The correct statements are that implementing autoscaling to dynamically adjust virtual machine instances demonstrates performance predictability, and configuring virtual machine replication to a secondary paired region represents a disaster recovery strategy.
The correct design choices involve implementing autoscaling to maintain consistent performance (performance predictability) and replicating workloads to a secondary Azure region (disaster recovery). Autoscaling dynamically adjusts resource count to keep latency stable, ensuring predictable user experience. Replicating resources to a geographically distinct paired region ensures that if the primary region fails entirely, the services can be failed over and restored, which defines disaster recovery.

Step-by-Step Solution

1
Analyze the requirements for performance consistency and business continuity during severe outages.
Identify that performance consistency relates to predictability, while surviving severe outages relates to disaster recovery.
This helps filter the choices based on the target cloud concepts of predictability and disaster recovery.
2
Evaluate each option's alignment with Azure fundamentals definitions.
Determine that autoscaling supports performance predictability, and regional replication supports disaster recovery. Conversely, availability zones are for high availability (not region-wide disaster recovery), and manual vertical scaling does not represent dynamic elasticity.
This confirms which statements are technically correct according to Microsoft Azure definitions.

Key Concept

Distinguishing between reliability, predictability, and disaster recovery in Microsoft Azure architectures.
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Topics

Reliability, Predictability, and Disaster Recovery

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