AZ-900 Describe Azure management and governance Practice Question
Which Azure tool helps you compare the 5-year cost of running an on-premises datacenter versus migrating those workloads to Azure?
⚠ Common exam trap
Watch out — candidates often confuse the Azure Pricing Calculator (which estimates service costs) with the TCO Calculator (which compares on-premises vs. cloud costs), leading them to select the Pricing Calculator because it sounds similar.
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
✓
Azure TCO Calculator
The Azure TCO (Total Cost of Ownership) Calculator is specifically designed to compare the costs of running an on-premises datacenter with the costs of migrating those workloads to Azure. It takes inputs such as server, storage, and network specifications, then generates a detailed report showing potential savings over a customizable period, including 5 years. This tool accounts for hardware, software, labor, electricity, and other on-premises costs, then maps them to equivalent Azure services.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure Pricing Calculator
Why it's wrong here
The Azure Pricing Calculator estimates the cost of specific Azure resources (such as VMs, storage, and networking) based on list prices, but it does not include any inputs about your existing on-premises environment or its operational expenses. It is designed to budget for a proposed Azure deployment, not to compare the total cost of ownership between your current data center and Azure. Because the question asks for a cost comparison over time, this calculator would only show the Azure side of the equation, making it the wrong tool.
- ✓
Azure TCO Calculator
Why this is correct
The Azure TCO Calculator is specifically built to model the full financial impact of moving on-premises workloads to Azure by accepting details about your current server, storage, network, and database inventory, plus assumptions about electricity and IT labor. It then generates a side-by-side, cumulative cost comparison over a period such as 3 or 5 years, which is exactly what the question describes. This makes it the correct choice for estimating pre-migration savings.
- ✗
Azure Cost Management + Billing
Why it's wrong here
Azure Cost Management + Billing is a post-deployment tool for tracking, analyzing, and governing actual Azure spending through budgets, alerts, and cost analysis reports. It has no capability to ingest on-premises infrastructure data or compute the lifetime costs of running servers in your own data center. Since the scenario involves a hypothetical comparison before any Azure migration has occurred, this tool cannot provide the required estimate.
- ✗
Azure Advisor cost recommendations
Why it's wrong here
Azure Advisor's cost recommendations focus on reducing waste in your existing Azure environment, such as rightsizing underutilized virtual machines or removing unattached public IP addresses. It relies on your current Azure consumption patterns and does not compare those against on-premises costs or calculate a total cost of ownership. Therefore, while it is useful for optimization after migration, it is not the right tool for estimating potential savings prior to making a migration decision.
Go deeper
Related to this question
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Azure Cost Management and Billing
Key term
Total cost of ownership
Total cost of ownership (TCO) is the complete cost of owning and operating an IT asset over its entire lifecycle, including purchase price, maintenance, support, energy, and disposal fees.
Key term
Report
A report in Azure data services is a structured output that summarizes, visualizes, or details data stored in cloud databases or data warehouses, often used for business intelligence and monitoring.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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