The correct answer is sustainability because it is the cloud computing benefit most directly tied to reducing carbon footprint through renewable energy. Cloud providers like Microsoft Azure achieve this by powering their global data centers with renewable energy sources such as wind and solar, and by purchasing carbon offsets, which allows customers to lower their environmental impact simply by migrating workloads away from less efficient on-premises infrastructure. On the AZ-900 exam, this concept tests your understanding of the “sustainability” pillar within Microsoft’s Well-Architected Framework, often appearing as a scenario where a company prioritizes environmental goals over cost or performance. A common trap is confusing sustainability with high availability or elasticity, but remember: sustainability is about green energy and carbon reduction, not uptime or scaling. Memory tip: think “green” for sustainability—renewable energy and carbon offsets are its core.
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 considering moving its on-premises workloads to the cloud. They want to reduce their carbon footprint by using a cloud provider that uses renewable energy. Which cloud computing benefit is most directly related to this goal?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
C) Sustainability
Option C is correct because sustainability directly addresses the goal of reducing carbon footprint through the use of renewable energy. Cloud providers like Microsoft Azure invest in renewable energy projects and carbon offset programs, enabling customers to lower their environmental impact by consolidating workloads in energy-efficient data centers. This benefit is explicitly tied to environmental responsibility, not operational metrics like uptime or resource scaling.
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.
✗
A) High availability
Why it's wrong here
High availability ensures applications remain accessible, not directly about energy consumption.
✗
B) Scalability
Why it's wrong here
Scalability allows handling growth, but doesn't directly address carbon footprint.
✓
C) Sustainability
Why this is correct
Cloud providers like Microsoft commit to using renewable energy, which helps customers reduce their carbon footprint.
Related concept
Read the scenario before looking for a memorised answer.
✗
D) Elasticity
Why it's wrong here
Elasticity refers to automatic scaling, not environmental impact.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse sustainability with other operational benefits like high availability or scalability, assuming any cloud advantage reduces environmental impact, whereas sustainability is a distinct pillar focused on renewable energy and carbon efficiency.
Detailed technical explanation
How to think about this question
Under the hood, cloud providers achieve sustainability through Power Purchase Agreements (PPAs) and Renewable Energy Certificates (RECs) to match energy consumption with renewable sources. For example, Microsoft has committed to being carbon negative by 2030, using 100% renewable energy by 2025, and implementing water-positive and zero-waste strategies in data centers. This contrasts with on-premises setups where energy sources are often fixed and less efficient, making cloud migration a direct lever for reducing Scope 2 emissions.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-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: C) Sustainability — Option C is correct because sustainability directly addresses the goal of reducing carbon footprint through the use of renewable energy. Cloud providers like Microsoft Azure invest in renewable energy projects and carbon offset programs, enabling customers to lower their environmental impact by consolidating workloads in energy-efficient data centers. This benefit is explicitly tied to environmental responsibility, not operational metrics like uptime or resource scaling.
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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Question Discussion
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