AZ-900 Describe cloud concepts Practice Question
Which statement best describes the 'economies of scale' advantage of cloud computing for customers?
⚠ Common exam trap
It's easy for candidates to confuse 'economies of scale' with 'free resources' or 'eliminating staff,' when the core concept is about cost reduction through provider-level efficiency and bulk purchasing power.
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
✓
Cloud providers achieve lower per-unit costs through massive purchasing power, offering customers lower prices
Economies of scale in cloud computing means that cloud providers like AWS, Azure, or Google Cloud operate at a massive scale, allowing them to negotiate bulk discounts on hardware, power, and cooling. These cost savings are passed down to customers in the form of lower pay-as-you-go prices, making it cheaper for individual organizations than running their own on-premises data centers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Organizations save money by eliminating all IT staff when using the cloud
Why it's wrong here
Economies of scale reduce infrastructure unit costs through Microsoft's aggregated demand, not headcount. Organisations still need staff to architect, secure and operate cloud workloads. Eliminating all IT staff is neither possible nor the source of savings; the claim misattributes a pricing benefit to staffing.
- ✓
Cloud providers achieve lower per-unit costs through massive purchasing power, offering customers lower prices
Why this is correct
Massive aggregate demand lets providers buy hardware, power and bandwidth at rates no single customer could negotiate, so per-unit costs fall. Those savings pass to customers as lower prices, satisfying the stem's economies-of-scale requirement without the customer owning any infrastructure.
- ✗
Organizations can use cloud resources without paying anything
Why it's wrong here
Cloud resources are never free; economies of scale means Microsoft's bulk purchasing and shared infrastructure lower per-unit prices passed to customers as pay-as-you-go rates. The option confuses cost reduction with zero cost, which no provider offers. Free tiers exist for trials, not as the economies-of-scale mechanism.
- ✗
Organizations pay less because cloud resources are lower quality than enterprise hardware
Why it's wrong here
Lower prices stem from Microsoft's scale and multi-tenant utilisation, not inferior hardware; cloud providers typically run current-generation enterprise-grade servers. Quality is unrelated to the economies-of-scale mechanism, which is about aggregated purchasing and shared capacity driving down per-unit cost.
Go deeper
Related to this question
Learn chapter
Service Level Agreements (SLAs) in Azure
Key term
Economies of scale
Economies of scale is the cost advantage that businesses get when production becomes more efficient as they grow larger, reducing the cost per unit.
Key term
Cloud computing
Cloud computing is the on-demand delivery of IT resources over the internet, allowing users to access computing power, storage, and applications without owning physical hardware.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.