Question 965 of 1,031

Describe cloud concepts →easyMultiple ChoiceObjective-mapped

Quick Answer

The answer is economies of scale. This is correct because Microsoft’s massive purchasing power for servers, networking gear, and cooling systems drives down the per-unit cost of hardware, a core technical concept of economies of scale in cloud computing. These savings are then passed to customers through lower Azure service prices, meaning your company benefits from reduced infrastructure costs without any operational changes on your end. On the AZ-900 exam, this scenario tests your ability to distinguish economies of scale from other cloud benefits like high availability or elasticity—a common trap is confusing it with cost savings from scaling resources up or down, which is actually elasticity. Remember the memory tip: “Bulk buying = bulk savings” to link the CFO’s hardware purchasing power directly to the economies of scale benefit.

AZ-900 Describe cloud concepts Practice Question

This AZ-900 practice question tests your understanding of describe cloud concepts. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

A company is evaluating moving its on-premises datacenter to Azure. The CFO points out that Microsoft purchases servers, networking equipment, and cooling systems in enormous quantities, enabling them to negotiate lower prices from hardware vendors. The company expects to benefit from these lower hardware costs as it migrates. Which cloud computing benefit does this scenario primarily describe?

Question 1easymultiple choice

Full question →

A
Elasticity
Why wrong: Elasticity refers to the ability to automatically scale resources up or down in response to demand. While cloud providers enable elasticity, the question specifically mentions bulk purchasing and lower hardware costs, which is not related to automatic scaling.
B
High availability
Why wrong: High availability ensures that applications and data remain accessible even when failures occur, often through redundancy across datacenters. The scenario mentions cost savings from bulk purchasing, not uptime or fault tolerance.
C
Economies of scale
Economies of scale mean that the average cost per unit decreases as the volume of production increases. Microsoft's massive scale allows it to obtain hardware at lower per-unit costs, which translates into lower prices for customers. This is the benefit described in the scenario.
D
Measured service
Why wrong: Measured service is the cloud characteristic where usage is metered and customers pay only for the resources they consume (e.g., per hour or per GB). While this is a key cloud benefit, it is about billing granularity, not about the cost advantages from bulk purchasing.

Full breakdown with real-world context →

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

✓

Economies of scale

The scenario describes how Microsoft's massive purchasing power reduces per-unit costs for hardware like servers and cooling systems, which is the definition of economies of scale. This benefit is passed to customers through lower Azure service prices, not through any operational or architectural feature of the cloud itself.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

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

✗
Elasticity
Why it's wrong here
Elasticity refers to the ability to automatically scale resources up or down in response to demand. While cloud providers enable elasticity, the question specifically mentions bulk purchasing and lower hardware costs, which is not related to automatic scaling.
✗
High availability
Why it's wrong here
High availability ensures that applications and data remain accessible even when failures occur, often through redundancy across datacenters. The scenario mentions cost savings from bulk purchasing, not uptime or fault tolerance.
✓
Economies of scale
Why this is correct
Economies of scale mean that the average cost per unit decreases as the volume of production increases. Microsoft's massive scale allows it to obtain hardware at lower per-unit costs, which translates into lower prices for customers. This is the benefit described in the scenario.
Related concept
Read the scenario before looking for a memorised answer.
✗
Measured service
Why it's wrong here
Measured service is the cloud characteristic where usage is metered and customers pay only for the resources they consume (e.g., per hour or per GB). While this is a key cloud benefit, it is about billing granularity, not about the cost advantages from bulk purchasing.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is confusing economies of scale (a financial benefit from bulk purchasing) with elasticity (a technical scaling feature), as both involve 'scaling' but in completely different contexts.

Trap categories for this question

Scenario analysis trap
High availability ensures that applications and data remain accessible even when failures occur, often through redundancy across datacenters. The scenario mentions cost savings from bulk purchasing, not uptime or fault tolerance.

Detailed technical explanation

How to think about this question

Economies of scale in cloud computing are driven by hyperscale datacenter designs where Microsoft, AWS, and Google negotiate volume discounts with vendors like Intel and Dell, achieving 30-50% lower hardware costs than a typical enterprise. This cost advantage is reflected in Azure's pay-as-you-go pricing model, where customers benefit without needing to match Microsoft's procurement volume. For example, Azure's reserved instances further pass on these savings for committed usage.

KKey Concepts to Remember

Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.

TExam Day Tips

Watch for words such as best, first, most likely and least administrative effort.
Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this AZ-900 question test?

Describe cloud concepts — This question tests Describe cloud concepts — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Economies of scale — The scenario describes how Microsoft's massive purchasing power reduces per-unit costs for hardware like servers and cooling systems, which is the definition of economies of scale. This benefit is passed to customers through lower Azure service prices, not through any operational or architectural feature of the cloud itself.

What should I do if I get this AZ-900 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Same concept, more angles

1 more ways this is tested on AZ-900

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. A manufacturing company is evaluating whether to migrate its on-premises workloads to Azure. The IT team calculates that the total cost of running the equivalent compute and storage resources in Azure is lower than operating its own datacenter. They attribute this cost advantage to the fact that Azure purchases servers, networking gear, and power in massive quantities and passes the savings on to customers by spreading the fixed costs across a vast number of tenants. This cost-saving benefit is a direct illustration of which cloud computing concept?

medium

✓ A.Economies of scale
B.Resource pooling
C.Measured service
D.Rapid elasticity

Why A: The scenario describes a cost advantage that arises because Azure buys hardware and energy in bulk, reducing per-unit costs and spreading fixed expenses across many customers. This is the direct definition of economies of scale, a core cloud concept where large-scale operations lower the average cost per unit, enabling providers to offer services at a lower price than individual organizations could achieve on-premises.

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