This MS-900 practice question tests your understanding of describe cloud concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 marketing team needs to temporarily increase their cloud storage capacity from 5 TB to 10 TB for a product launch. They can perform this change themselves through a web portal without contacting the cloud provider. Which cloud characteristic does this scenario demonstrate?
Correct. The user can provision storage capacity themselves via the web portal without provider involvement.
B
Rapid elasticity
Why wrong: Incorrect. While storage can be increased quickly, the scenario emphasizes that the user performed the action themselves without contacting the provider, which is more specific to on-demand self-service.
C
Measured service
Why wrong: Incorrect. Measured service refers to metering usage for billing, not the ability to self-provision resources.
D
Resource pooling
Why wrong: Incorrect. Resource pooling describes the provider's ability to serve multiple customers from shared physical resources, not user self-service.
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
This scenario demonstrates on-demand self-service because the marketing team can provision and manage their own cloud storage capacity increase from 5 TB to 10 TB through a web portal without any human interaction with the cloud provider. This is a core NIST-defined characteristic where users can unilaterally provision computing resources as needed automatically, requiring no service provider intervention.
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.
✓
On-demand self-service
Why this is correct
Correct. The user can provision storage capacity themselves via the web portal without provider involvement.
Related concept
Read the scenario before looking for a memorised answer.
✗
Rapid elasticity
Why it's wrong here
Incorrect. While storage can be increased quickly, the scenario emphasizes that the user performed the action themselves without contacting the provider, which is more specific to on-demand self-service.
✗
Measured service
Why it's wrong here
Incorrect. Measured service refers to metering usage for billing, not the ability to self-provision resources.
✗
Resource pooling
Why it's wrong here
Incorrect. Resource pooling describes the provider's ability to serve multiple customers from shared physical resources, not user self-service.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing 'on-demand self-service' with 'rapid elasticity' because both involve scaling, but on-demand self-service focuses on the user's ability to provision resources without provider interaction, while rapid elasticity focuses on automatic, dynamic scaling in response to load changes.
Trap categories for this question
Scenario analysis trap
Incorrect. While storage can be increased quickly, the scenario emphasizes that the user performed the action themselves without contacting the provider, which is more specific to on-demand self-service.
Detailed technical explanation
How to think about this question
On-demand self-service is typically implemented through a RESTful API or web interface that interacts with the cloud provider's orchestration layer (e.g., Azure Resource Manager). When a user requests a storage increase, the portal triggers a series of API calls to the storage controller (e.g., Azure Storage Resource Provider), which updates the storage account's capacity quota without any manual approval workflow. This contrasts with traditional on-premises models where storage expansion required a ticket to the IT team and physical hardware provisioning.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-900 question in full detail.
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 — This scenario demonstrates on-demand self-service because the marketing team can provision and manage their own cloud storage capacity increase from 5 TB to 10 TB through a web portal without any human interaction with the cloud provider. This is a core NIST-defined characteristic where users can unilaterally provision computing resources as needed automatically, requiring no service provider intervention.
What should I do if I get this MS-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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Question Discussion
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