Question 645 of 981
AZ-900 Describe cloud concepts Practice Question
Which Azure cloud benefit allows a company to avoid predicting exactly how much compute capacity it needs months in advance?
⚠ Common exam trap
It's easy for candidates to confuse elasticity with fault tolerance or geo-redundancy, thinking that high availability features automatically handle capacity scaling, but elasticity is specifically about dynamic resource adjustment to meet variable demand, not about resilience or data replication.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Elasticity
Elasticity is the Azure cloud benefit that allows a company to automatically scale compute resources up or down based on real-time demand, eliminating the need to predict capacity months in advance. With Azure Virtual Machine Scale Sets or Azure App Service auto-scale, resources can be added or removed dynamically, ensuring you only pay for what you use. This contrasts with traditional on-premises capacity planning, where over-provisioning or under-provisioning is common.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Fault tolerance
Why it's wrong here
Fault tolerance is a resilience capability that enables a system to continue operating correctly in the event of a component or infrastructure failure, typically through redundancy, failover, and health monitoring. It focuses on uptime and availability during disruptive events, not on matching capacity to fluctuating workload demand. Fault tolerance neither analyzes usage trends nor adjusts resource allocation dynamically, so it is unrelated to eliminating advance capacity predictions.
- ✗
Geo-redundancy
Why it's wrong here
Geo-redundancy is a data durability and disaster-recovery strategy that maintains replicated copies of data in two or more geographically separate Azure regions, protecting against datacenter-level outages. While it provides high availability for data, it does not automatically scale compute, storage, or network resources in response to real-time demand changes. Geo-redundancy is about location-based resilience, not about the dynamic provisioning and deprovisioning of resources that elasticity offers.
- ✓
Elasticity
Why this is correct
Elasticity is the cloud capability that automatically provisions and releases compute, storage, and other resources to match the exact level of current demand, scaling out during traffic spikes and scaling in during lulls. This dynamic, reactive adjustment eliminates the need for IT teams to pre-purchase or over-provision capacity based on forecasted usage, because the platform handles scaling in real time. Elasticity directly supports pay-per-use cost models by ensuring you only consume what you actually need at any given moment.
- ✗
Economies of scale
Why it's wrong here
Economies of scale refers to the cost advantage that arises when a provider like Azure operates massive shared infrastructure, spreading fixed costs across millions of customers and lowering the per-unit price of services. This cost efficiency is passed on to customers through competitive pricing but does not involve any automatic, demand-driven adjustment of resource counts or sizes. It is a financial and operational benefit of scale, not a mechanism for dynamically matching capacity to workload fluctuations.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 11, 2026
This AZ-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-900 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.