Question 227 of 1,031

Describe cloud concepts →mediumMultiple ChoiceObjective-mapped

Quick Answer

The correct answer is on-demand self-service, because this cloud computing characteristic enables users to provision resources like virtual machines and storage instantly without any human interaction or manual approval from a central IT team. As defined by NIST SP 800-145, on-demand self-service allows a consumer to unilaterally provision computing capabilities as needed, which directly fulfills the startup’s requirement for no-wait provisioning. On the Microsoft Azure Fundamentals AZ-900 exam, this concept tests your understanding of the five essential characteristics of cloud computing, and it often appears in scenario-based questions where a developer or team needs rapid, automated resource access without IT bottlenecks. A common trap is confusing this with rapid elasticity, which focuses on scaling resources up or down, not on the self-service provisioning itself. To remember it, think of the phrase “no ticket, no wait”—on-demand self-service means you click and get your VM or storage immediately, just like ordering from a vending machine.

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 startup wants to migrate its application to Azure. The development team needs to be able to provision virtual machines and storage on demand without waiting for manual approval from a central IT team. Which characteristic of cloud computing directly fulfills this requirement?

Question 1mediummultiple choice

Full question →

A
Measured service
Why wrong: Measured service means cloud resources are monitored, controlled, and reported, providing transparency for billing. While important, it does not enable automatic provisioning without human interaction.
B
On-demand self-service
On-demand self-service is the correct characteristic. It allows a cloud consumer to unilaterally provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with each service provider.
C
Rapid elasticity
Why wrong: Rapid elasticity refers to the ability to quickly scale resources outward and inward based on demand. It does not directly eliminate the need for manual approval or human interaction to initially provision resources.
D
Resource pooling
Why wrong: Resource pooling allows the provider to serve multiple customers from a shared pool of physical and virtual resources. While it supports scalability, it does not enable users to provision resources without human interaction.

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

✓

On-demand self-service

B is correct because on-demand self-service allows users to provision cloud resources like virtual machines and storage automatically, without requiring human interaction or manual approval from a central IT team. This characteristic is defined by NIST SP 800-145 as the ability for a consumer to unilaterally provision computing capabilities as needed, which directly matches the startup's requirement for no-wait provisioning.

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.

✗
Measured service
Why it's wrong here
Measured service means cloud resources are monitored, controlled, and reported, providing transparency for billing. While important, it does not enable automatic provisioning without human interaction.
✓
On-demand self-service
Why this is correct
On-demand self-service is the correct characteristic. It allows a cloud consumer to unilaterally provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with each service provider.
Related concept
Read the scenario before looking for a memorised answer.
✗
Rapid elasticity
Why it's wrong here
Rapid elasticity refers to the ability to quickly scale resources outward and inward based on demand. It does not directly eliminate the need for manual approval or human interaction to initially provision resources.
✗
Resource pooling
Why it's wrong here
Resource pooling allows the provider to serve multiple customers from a shared pool of physical and virtual resources. While it supports scalability, it does not enable users to provision resources without human interaction.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse rapid elasticity with on-demand self-service, but rapid elasticity is about scaling capacity up/down dynamically, not the initial provisioning without human intervention.

Detailed technical explanation

How to think about this question

On-demand self-service is typically implemented through a cloud provider's management portal, CLI, or REST API (e.g., Azure Resource Manager API), allowing users to spin up VMs or storage accounts via automated workflows. Under the hood, this relies on orchestration services like Azure Resource Manager that validate policies and quotas programmatically, bypassing any manual ticketing system. In a real-world scenario, a developer can use the Azure CLI command `az vm create` to deploy a VM in seconds, with the platform enforcing subscription limits and RBAC roles automatically.

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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.

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: On-demand self-service — B is correct because on-demand self-service allows users to provision cloud resources like virtual machines and storage automatically, without requiring human interaction or manual approval from a central IT team. This characteristic is defined by NIST SP 800-145 as the ability for a consumer to unilaterally provision computing capabilities as needed, which directly matches the startup's requirement for no-wait provisioning.

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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