AZ-900 Describe cloud concepts Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  A) High availability

  Why it's wrong here

  High availability is incorrect because it focuses on keeping applications running despite failures, using techniques such as redundancy, failover clusters, and availability zones to minimize downtime. This architectural property relates to operational resilience and business continuity, but it has no direct connection to energy source, emissions, or renewable energy usage, and therefore does not help a customer specifically reduce its carbon footprint.

  When this WOULD be correct

  A question asking which cloud benefit ensures minimal downtime and continuous operation even during failures, such as 'A company needs its critical applications to remain accessible during a regional outage. Which benefit is most relevant?'

• ✗

  B) Scalability

  Why it's wrong here

  Scalability is incorrect because it addresses the ability to expand or shrink resources to accommodate growing demand—usually by adding virtual machines, storage, or capacity—without regard to how those resources are powered. While scaling might consolidate workloads onto efficient hardware, its primary objective is performance and capacity, not reducing environmental impact, so it does not directly address a company's carbon footprint.

  When this WOULD be correct

  A company expects fluctuating user demand and needs to automatically adjust computing resources to handle peak loads without manual intervention. In that scenario, scalability would be the correct answer because it ensures the system can grow or shrink to meet demand efficiently.

• ✓

  C) Sustainability

  Why this is correct

  Sustainability is correct because cloud providers such as Microsoft make specific commitments to renewable energy procurement, carbon neutrality, and energy-efficient data center design. By migrating on-premises workloads to the cloud, a customer can reduce their operational carbon footprint, as the provider aggregates compute across highly efficient infrastructure and offsets residual emissions through investments in renewable energy projects.

• ✗

  D) Elasticity

  Why it's wrong here

  Elasticity is incorrect because it describes the automatic ability to provision and release resources in real time based on current load, often to optimize for both cost and performance. Although elastic scaling can avoid overprovisioning and may reduce short-term energy waste, its core design goal is dynamic workload matching rather than environmental sustainability, and it does not entail any commitment to renewable energy or carbon reduction.

  When this WOULD be correct

  A company experiences unpredictable traffic spikes and needs to automatically adjust compute resources to maintain performance without over-provisioning. In this scenario, elasticity is the correct benefit because it ensures resources match demand in real-time.

Option-by-option analysis

Why each answer is right or wrong

Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-900 exam frequently reuses these exact scenarios with slightly different constraints.

Analysis generated from the official AZ-900blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”

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